Relevant bibliographies by topics / Ogasawara

Academic literature on the topic 'Ogasawara'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Ogasawara"

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C, Liu, Chen W B, and Shi R X. "Ogasawara Islands." Journal of Global Change Data & Discovery 2, no. 2 (2018): 220–23. http://dx.doi.org/10.3974/geodp.2018.02.17.

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Nakagun, Shotaro, Laetitia I. Smoll, Takayuki Sato, Cynthia A. A. Layusa, and Jo Marie V. Acebes. "Interchange of humpback whales (Megaptera novaeangliae) between northern Philippines and Ogasawara, Japan, has implications for conservation." Pacific Conservation Biology 26, no. 4 (2020): 378. http://dx.doi.org/10.1071/pc19003.

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Humpback whales (Megaptera novaeangliae) in the western North Pacific breed in the Philippines and Japan, where there is relatively little scientific data available, leading to uncertainty about their population status and structure. This study investigates links between humpback whale populations in northern Philippines and Ogasawara, Japan, through a comparison of the most recent fluke identification catalogues. The Philippines catalogue (1999–2016) included 234 individuals, and the Ogasawara catalogue (1987–2014), 1389 individuals. The number of matched individuals was 86 (including 14 known females and 40 known males), corresponding to 36.8% of the Philippines and 6.2% of the Ogasawara catalogues. The findings included four within-season matches, with travel times as short as 25 days. The results suggest that a considerable portion of whales utilising Philippine waters pass through and also utilise the Ogasawara region, but the majority of whales found off Ogasawara either stay in that location, move to different breeding grounds, or remain out of the sampling area. Nevertheless, in light of the high site fidelity of individuals in the Philippines and Ogasawara area, as well as constant evidence of breeding activities, these regions are of importance to the lesser known western North Pacific subpopulation. Humpback whales migrating to this part of the world are estimated to be in relatively low abundance, therefore continued conservation attention is needed.
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Kobayashi, Nozomi, Satomi Kondo, Koki Tsujii, Katsuki Oki, Masami Hida, Haruna Okabe, Takashi Yoshikawa, et al. "Interchanges and movements of humpback whales in Japanese waters: Okinawa, Ogasawara, Amami, and Hokkaido, using an automated matching system." PLOS ONE 17, no. 11 (November 17, 2022): e0277761. http://dx.doi.org/10.1371/journal.pone.0277761.

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Humpback whales in the western North Pacific are considered endangered due to their small population size and lack of information. Although previous studies have reported interchanges between regions within a population, the relationship between the geographic regions of a population in Japan is poorly understood. Using 3,532 fluke photo IDs of unique individuals obtained from four areas in Japan: Hokkaido, six IDs (2009–2019); Ogasawara, 1,477 IDs, from two organizations (1) Everlasting nature of Asia (1987–2020) and (2) Ogasawara Whale Watching Association, (1990–2020); Amami, 373 IDs (1992–1994, 2005–2016); Okinawa, 1,676 IDs (1990–2018), interchanges were analyzed. The ID matchings were conducted using an automated system with an 80.9% matching accuracy. Interchange and within-region return indices were also calculated. As a result, number of matches and interchange indices follow locations, Hokkaido-Okinawa (3, 0.31), Amami-Ogasawara (36, 0.06), Amami-Okinawa (222, 0.37), and Okinawa-Ogasawara (225, 0.08), respectively. Interchange indices among Japanese areas were much higher than the indices between Ogasawara/Okinawa and Hawaii (0.01) and Mexico (0.00) reported in previous studies, indicating that the Japanese regions are utilized by the same population. At the same time, the frequency of interchanges among the three breeding areas vary, and the high within-region return indices in respective breeding areas suggest the site fidelity of the whales in each area at some level. These results indicate the existence of several groups within the population which are possibly be divided into at least two groups based on geographical features: one tend to utilize Ogasawara and the Mariana Archipelago; the other utilize Amami, Okinawa, and the Philippines, migrating along the Ryukyu and Philippine Trench. The matching results also suggest that Hokkaido is possibly be utilized as a corridor between northern feeding areas and southern breeding areas at least by individuals migrating to Okinawa area.
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Kawagucci, Shinsuke, Akiko Makabe, Taketoshi Kodama, Yohei Matsui, Chisato Yoshikawa, Etsuro Ono, Masahide Wakita, Takuro Nunoura, Hiroshi Uchida, and Taichi Yokokawa. "Hadal water biogeochemistry over the Izu–Ogasawara Trench observed with a full-depth CTD-CMS." Ocean Science 14, no. 4 (July 13, 2018): 575–88. http://dx.doi.org/10.5194/os-14-575-2018.

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Abstract. Full-depth profiles of hydrographic and geochemical properties at the Izu–Ogasawara Trench were observed for the first time using a CTD-CMS (conductivity–temperature–depth profiler with carousel multiple sampling) system. Additionally, comparative samplings were done at the northern Mariana Trench using the same methods. A well-mixed hydrographic structure below 7000 m was observed within the Izu–Ogasawara Trench. Seawater samples collected from this well-mixed hadal layer exhibited constant concentrations of nitrate, phosphate, silicate, and nitrous oxide as well as constant nitrogen and oxygen isotopic compositions of nitrate and nitrous oxide. These results agree well with previous observations of the Izu–Ogasawara hadal waters and deep-sea water surrounding the Izu–Ogasawara Trench. In turn, methane concentrations and isotopic compositions indicated spatial heterogeneity within the well-mixed hadal water mass, strongly suggesting a local methane source within the trench, in addition to the background methane originating from the general deep-sea bottom water. Sedimentary compound releases, associated with sediment re-suspensions, are considered to be the most likely mechanism for generating this significant CH4 anomaly.
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Chiba, Yuka, and Tadashi Suzuki. "Breeding Biology of the Ogasawara Buzzard Endemic to the Ogasawara (Bonin) Islands." Ornithological Science 10, no. 2 (December 2011): 119–29. http://dx.doi.org/10.2326/osj.10.119.

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Takano, Toshiyuki, Shinichi Kusakabe, and Terumi Mukai. "The Genetic Structure of Natural Populations of Drosophila melanogaster. XX. Comparison of Genotype-Environment Interaction in Viability Between a Northern and a Southern Population." Genetics 117, no. 2 (October 1, 1987): 245–54. http://dx.doi.org/10.1093/genetics/117.2.245.

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ABSTRACT In order to examine the operation of diversifying selection as the maintenance mechanism of excessive additive genetic variance for viability in southern populations in comparison with northern populations of Drosophila melanogaster, two sets of experiments were conducted using second chromosomes extracted from the Ogasawara population (a southern population in Japan) and from the Aomori population (a northern population in Japan). Chromosomal homozygote and heterozygote viabilities were estimated in eight kinds of artificially produced breeding environments. The main findings in the present investigation are as follows: (1) Significant genotype-environment interaction was observed using chromosomes extracted from the Ogasawara population. Indeed, the estimate of the genotype-environment interaction variance for heterozygotes was significantly larger than that of the genotypic variance. On the other hand, when chromosomes sampled from the Aomori population were examined, that interaction variance was significant only for homozygotes and its value was no more than one quarter of that for the chromosomes from the Ogasawara population. (2) The average genetic correlation between any two viabilities of the same lines estimated in the eight kinds of breeding environments for the chromosomes sampled from the Ogasawara population was smaller than that for the chromosomes from the Aomori population both in homozygotes and in heterozygotes, especially in the latter. (3) The stability of heterozygotes over homozygotes against fluctuations of environmental conditions was seen in the chromosomes from the Ogasawara population, but not from the Aomori population. (4) From the excessive genotype-environment interaction variance compared with the genotypic variance in heterozygotes, it was suggested for the chromosomes from the Ogasawara population that the reversal of viability order between homozygotes took place in some environments at the locus level. On the basis of these findings, it is strongly suggested that diversifying selection is operating in a southern population of D. melanogaster on some of the viability polygenes which are probably located outside the structural loci, and the excessive additive genetic variance of viability in southern populations is maintained by this type of selection.
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Darling, J. D., and K. Mori. "Recent observations of humpback whales (Megaptera novaeangliae) in Japanese waters off Ogasawara and Okinawa." Canadian Journal of Zoology 71, no. 2 (February 1, 1993): 325–33. http://dx.doi.org/10.1139/z93-045.

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The current status of humpback whales in waters off Ogasawara and Okinawa islands, Japan, and the relationship of these populations to each other and to humpback whales in the central-eastern North Pacific were investigated. Fluke-identification photographs collected from 1987 to 1990 were analyzed to estimate abundance and determine individual behavior patterns, and were compared with humpback photoidentifications from other regions. In total, 177 humpbacks were identified. At the end of the study period the rate of discovery of "new" whales was still high, suggesting a substantially larger overall population. Whales were commonly sighted throughout the Ogasawara archipelago from December to May, and were present during the same period near the Kerama Islands, Okinawa. Humpback whales were not regularly seen near Saipan in the Northern Mariana Islands, or near Kenting, Taiwan. Repeat sightings of individuals indicate that some whales were present for extended periods off Ogasawara. The predominant behavior patterns were those related to calving and mating. Two whales were identified in both the Okinawa and Ogasawara regions in different years, suggesting that both regions are used by the same population. Identification of one whale in both Japan and Hawaii (reported elsewhere) indicates the potential for mixing of western and eastern North Pacific humpback populations; the overall matching effort to date suggests that this interchange is relatively small.
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Yoshitomi, Hiroyuki, Haruki Karube, and Masakazu Hayashi. "A new species of the genus Ochthebius (Coleoptera, Hydraenidae) from the Ogasawara Islands, Japan, with a description of the larva." ZooKeys 855 (June 13, 2019): 95–107. http://dx.doi.org/10.3897/zookeys.855.35677.

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A new species of the genus Ochthebius, O. (O.) sasakiisp. nov., is described from the Ogasawara Islands, Japan, with a description of the larva. This record is the first of the family Hydraenidae from the Ogasawara Islands. This species belongs to the punctatus species group and is similar to two Japanese species, O. (O.) inermis Sharp, 1884 and O. (O.) danjo Nakane, 1990, but it differs from them in both adult and larval characters. The larva of O. (O.) inermis is also described for comparison.
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FRISCH, ANDREAS, MARTIN GRUBE, HIROYUKI KASHIWADANI, and YOSHIHITO OHMURA. "Arthoniaceae with reddish, K+ purple ascomata in Japan." Phytotaxa 356, no. 1 (June 13, 2018): 19. http://dx.doi.org/10.11646/phytotaxa.356.1.2.

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Arthonia sanguinaria is described as new to science. The East Asian Arthonia lopingensis and the widely distributed Arthonia picea are reported as new to Japan from Honshu and the Ogasawara Islands, respectively. The phylogenetic position of A. picea, A. sanguinaria and Coniocarpon cinnabarinum from the Ogasawara Islands is shown by RAxML and Bayesian analysis of mtSSU, nLSU and RPB2 sequence data. Our results confirm the polyphyletic origin of quinoid pigments in Arthoniaceae. A key is presented to the Arthoniaceae with reddish ascomata in Japan.
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Ishihara, Shun. "Modern Japan and Ogasawara Islands." Japanese Sociological Review 60, no. 1 (2009): 160–62. http://dx.doi.org/10.4057/jsr.60.160.

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Dissertations / Theses on the topic "Ogasawara"

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Odo, David. "The edge of the field of vision : defining Japaneseness and the image archive of the Ogasawara Islands." Thesis, University of Oxford, 2004. http://ora.ox.ac.uk/objects/uuid:f76fb540-7b9a-4e96-989c-2492576d7d6f.

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This thesis examines the image archive of photographs of the Ogasawara (Bonin) Islands of Japan within the framework of historically informed visual anthropology. It is argued that investigating the photography of Ogasawara, which has an ethnically diverse population of descendants of the pre-Japanese, nineteenth-century settlement, exposes the processes that have configured modern 'Japaneseness'. Towards this end, the major areas explored are early Japanese photographic practice, visual aspects of Japanese colonialism, Japanese domestic tourism and the use of photography in the creation and maintenance of ideas about Japanese culture. Extremely rare imperial, government and commercial images, including albumen prints, cartes de visite and postcards, from museums, archives and private collections are examined in this study. The trajectories of these images through the 'visual economy' are traced as they are produced, circulated and gather meanings in a variety of contexts, from early colonial encounters to contemporary tourist engagements. These processes are exposed through an investigation of early Japanese photographic practice, colonial expeditions to Ogasawara, the shifting location of Islanders as 'slippery' internal others within configurations of Japaneseness, Japanese domestic tourism and the tourist discourse in contemporary Ogasawara. This has enabled the development of an alternative history of early Japanese photographic practice and a new understanding of Japanese domestic tourism. These new ways of conceptualising photography and tourism in Japan, together with insights gained from ethnographic investigations of the Ogasawaran image archive, demonstrate that photography played a major role in the construction of modern Japaneseness, rather than merely being a by-product of modernisation. Through an examination of images from the archive of photographs of the Ogasawara Islands, one gains an understanding of modern Japan as a society more diverse than the mostly homogeneous nation it is generally represented as, and more fluid in its definitions of Japaneseness than previously thought.
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Saiki, Shintarou. "The variations of drought tolerance along soil depth gradient and the physiological mechanisms of drought-induced and pathogenic tree die-offs in the Bonin Islands." Kyoto University, 2017. http://hdl.handle.net/2433/228226.

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Shishikura, Masaya. "Wanting memories: histories, remembrances and sentiments inscribed in music and dance of the Ogasawara Islands." Phd thesis, 2013. http://hdl.handle.net/1885/11185.

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This thesis explores histories, remembrances and sentiments inscribed in music and dance of the Ogasawara Islands. Through a musical ethnography, the thesis illustrates the identity and dignity of this small, remote but extensively connected community in the Pacific. Since the first settlement of 1830, the islanders have suffered various hardships caused by colonialism, war and international politics. As a result, a fracturing of memories has occurred that created a deep sorrow in the islanders’ sentiments. However they hardly stand idle lamenting loss and absence while trying to console their sentiments through singing and dancing. The want of memories reveals a responsive sense of yearning, and calls for multiple forms of historical narratives, practices and performances. Music and dance can be vital media to recollect and retrieve things past, because they preserve various fragments of the past in song lyrics, bodily movements and dance choreographies. These fragmented memories are often judged as ambiguous, incomplete and defective in conventional historiography. A diversity of Ogasawara musical activities appears to represent the fracturing of memories, but it actually provides an alternative view to see the islands beyond mere historical factuality, and enriches our historical consciousness, understandings and experiences towards collective remembrance. In this view from the frontier, the thesis recognises Ogasawara’s own memories that are associated with many other places and peoples, and affirms its identity and dignity beyond imagined boundaries of border, nation and ethnicity.
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Ogasawara, Yoshito, and 小笠原良人. "Adopting Mutiple Techniques Mainly focus on Gongbi－The Representation in Ogasawara Yoshito's Ink Figure Paintings." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/dq3r4z.

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碩士
國立臺灣師範大學
美術學系
104
What is the essence of figure painting? The figure painting resembles the person is the main point of successful works. Keen observation and accurate sketching are essential to express the feature of the subject, thus objectivity could be displayed. The quality of art lies within originality; value of art depends on style. Therefore, the proposition of the artwork is rather subjective. The ideal of Chinese Figure Painting creation is the synergy of two views; objectivity and subjectivity. It is difficult to exceed camerawork and to display one’s stylewhile pursuing detailed subject resemblance such as photographs. Combining various techniques and studying owns’creation could resolve this difficulty. Mixing techniques has the risk of disordering display, but in contrast it may initiate a new development of creation. What is the key to successful combination and to elaborate on one’s work? A good figure painting is bothaccuracy and individuality. This study is to reach the optimal state of figure painting.
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Cunningham, PA. "Exploring sense of place and destination image assessment : ecotourism and social valuing in Ogasawara, Japan." Thesis, 2008. http://hdl.handle.net/10453/36115.

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University of Technology, Sydney. Faculty of Business.
NO FULL TEXT AVAILABLE. Access is restricted indefinitely. The hardcopy may be available for consultation at the UTS Library.
NO FULL TEXT AVAILABLE. Access is restricted indefinitely. ----- Sociological analyses of place have tended to focus on the macro social influences of place on person and less so on the micro, interactive and relational influences of people and place. The field of tourism has focused on destination image, as conceived by the industry and as consumed by visitors. Yet little research to date has explored the meaning of place on the part of the host. Social values are used as a vehicle to explore the myriad of relationships and meanings that emerge through social interaction and construction within the local community—particularly those that influence valuations for the natural and social environments. A poststructural, interactionist, grounded theory approach has been adopted in an effort to uncover the multiple, complex and discursive nature of texts that inform the narrative of this thesis. A case study is undertaken in order to focus on the indigenous population in Ogasawara, Japan and to advance the current understanding of sense of place from the perspective of host, living in a sub-colonial space. The marginalization of this group of people is illustrated by a general lack of agency and trust for the official discourse on sustainability and ecotourism and underscores the notion of contested natures. It is hoped that the micro-social context of this study will contribute to our understanding of tourist destination as place and inform a more equitable representation of it. To achieve this, the thesis investigates sense of place through the concept of dwelling in place over time.
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Books on the topic "Ogasawara"

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Hensan-jo, Tōkyō Daigaku Shiryō. Ogasawara monjo. 8th ed. Tōkyō: Yagi Shoten, 2008.

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Kenkyūkai, Ogura Hanshi. Ogasawara-han samuraichō. Tōkyō: Hōwa Shuppan, 1994.

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Ōkuma, Ryōichi. Ogasawara Shotō ikokusen raikōki. 8th ed. Tōkyō: Kondō Shuppansha, 1985.

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Ogasawara Shotō ikokusen raikōki. Tōkyō: Kondō Shuppansha, 1985.

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Ogasawara Nagakiyo-kō Shiryō Kentō Iinkai. Ogasawara Nagakiyo-kō shiryōshū. Yamanashi-ken Nakakoma-gun Kushigata-machi: Kushigata-machi, 1991.

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Tsuji, Tomoe. Ogasawara shotō rekishi nikki: Ogasawara o shiru ni wa rekishi o sagurō. Tōkyō: Kindai Bungeisha, 1995.

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Ōzeki, Eisaku. Ogasawara shotō Hahajima sensō shōshi. Tōkyō: Yamanami Kikaku, 1995.

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Ogasawara Shotō Minzokushi Hensan Iinkai Izu Shotō. Izu Shotō, Ogasawara Shotō minzokushi. Tōkyō: Tōkyō-to Tōsho Chōson Ichibu Jimu Kumiai, 1993.

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Ogasawara Shotō o meguru sekaishi. Fukuoka-shi: Gen Shobō, 2014.

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Maki, Taichi. Ogasawara annai: Kishō shizen rekishi bunka. Kagoshima-shi: Nanpō Shinsha, 2012.

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Book chapters on the topic "Ogasawara"

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Claudino-Sales, Vanda. "Ogasawara Islands, Japan." In Coastal World Heritage Sites, 341–47. Dordrecht: Springer Netherlands, 2018. http://dx.doi.org/10.1007/978-94-024-1528-5_50.

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Ishii, Teruaki. "Dredged Samples from the Ogasawara Fore-Arc Seamount or “Ogasawara Paleoland”—“Fore-Arc Ophiolite”." In Formation of Active Ocean Margins, 307–42. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4720-7_14.

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Chapman, David. "History and the Bonin (Ogasawara) Islands." In Routledge Handbook of Race and Ethnicity in Asia, 381–92. London: Routledge, 2021. http://dx.doi.org/10.4324/9781351246705-30.

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Yoshida, Masahito. "Ogasawara Islands World Heritage Area: An Outstanding Ecological Heritage." In Geoheritage, Geoparks and Geotourism, 61–72. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61896-8_6.

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Abe, Tetsuto, Shun'ichi Makino, and Isamu Okochi. "Why have endemic pollinators declined on the Ogasawara Islands?" In Restoring the Oceanic Island Ecosystem, 75–83. Tokyo: Springer Japan, 2010. http://dx.doi.org/10.1007/978-4-431-53859-2_13.

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Okochi, Isamu, Hiroki Sato, and Takashi Ohbayashi. "The cause of mollusk decline on the Ogasawara Islands." In Restoring the Oceanic Island Ecosystem, 15–25. Tokyo: Springer Japan, 2010. http://dx.doi.org/10.1007/978-4-431-53859-2_3.

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Mayumi, Yoshimura, and Okochi Isamu. "A decrease in endemic odonates in the Ogasawara Islands, Japan." In Restoring the Oceanic Island Ecosystem, 139–44. Tokyo: Springer Japan, 2010. http://dx.doi.org/10.1007/978-4-431-53859-2_21.

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Hashimoto, Takuma. "Eradication and Ecosystem Impacts of Rats in the Ogasawara Islands." In Restoring the Oceanic Island Ecosystem, 153–59. Tokyo: Springer Japan, 2010. http://dx.doi.org/10.1007/978-4-431-53859-2_23.

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Chapman, David. "Identifying the Periphery: Challenging Citizenship, Nationality, and Identity on the Ogasawara Islands." In Living Intersections: Transnational Migrant Identifications in Asia, 193–211. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-2966-7_10.

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Ohbayashi, Takashi, Isamu Okochi, Hiroki Sato, Tsuyoshi Ono, and Satoshi Chiba. "Rapid decline of endemic snails in the Ogasawara Islands, Western Pacific Ocean." In Restoring the Oceanic Island Ecosystem, 27–33. Tokyo: Springer Japan, 2010. http://dx.doi.org/10.1007/978-4-431-53859-2_4.

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Conference papers on the topic "Ogasawara"

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Yamashita, Mikiya, Yoshio Fukao, Kanako Hasumi, Seiichi Miura, and Shuichi Kodaira. "Reflection imaging of oceanic fine structure under strong ocean current in the Izu-Ogasawara region." In Proceedings of the 12th SEGJ International Symposium, Tokyo, Japan, 18-20 November 2015. Society of Exploration Geophysicists and Society of Exploration Geophysicists of Japan, 2015. http://dx.doi.org/10.1190/segj122015-081.

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Komaki, Kanae, Mitsuru Shimazu, Shunsuke Kondo, Yosuke Onishi, Satoshi Furuta, and Rei Arai. "Laboratory Experimentations for New Hydrothermal Monitoring Systems Using ADCPs." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10610.

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Deep ocean mining in a hydrothermal area needs careful environmental impact assessments in terms of preservation and mitigation of biodiversity. The General Environmental Technos Co. Ltd., or KANSO TECHNOS, for short, has participated in environmental impact assessments in hydrothermal areas in the Izu-Ogasawara and the East China Sea areas (Ishida et al., 2011). Through the experience, we suggest a method of using acoustic systems such as acoustic Doppler current profilers (ADCPs) for monitoring of suspended matters and benthos in hydrothermal areas. Thus, we try to do in-situ observations, called Tow-yo (or Towing) observations with ADCPs (Komaki and Ura, 2009; Komaki et al., 2010). This system has a great advantage in enabling the measurement of great environmental factors, echo intensity and current velocity in a large range. To confirm exactly what the substances are and how large they are from the measured echo intensity data, we tried laboratory experiments in water tanks with echo sounders and turbidity sensors. These results will finally be integrated in a simulation model to predict substances from in-situ data in deep water for future monitoring systems.
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Kondo, Shunsuke, Tatsuo Fukuhara, Yasuo Furushima, Tetsuya Miwa, Hiroyuki Yamamoto, and Tomohiko Fukushima. "Measurement of the Vertical Profile of Phytoplankton by Using Fast Repetition Rate Fluorometry: Baseline Observation at the Okinawa Trough and Izu-Ogasawara Waters, Japan." In 2018 OCEANS - MTS/IEEE Kobe Techno-Ocean (OTO). IEEE, 2018. http://dx.doi.org/10.1109/oceanskobe.2018.8559372.

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Inoue, Tomoya, Hiroyuki Osawa, Hiroshi Yoshida, Junichiro Tahara, Shojiro Ishibashi, Kazuaki Ito, Yoshitaka Watanabe, Takao Sawa, and Tadahiro Hyakudome. "Sea Trial Results of ROV “ABISMO” for Deep Sea Inspection and Sampling." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57347.

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JAMSTEC (Japan Agency for Marine-Earth Science and Technology) has been developing the deep sea ROV ABISMO (Automatic Bottom Inspection and Sampling Mobile) having the capability to dive to the deepest sea. The purposes of ABISMO are to inspect on the seabed in the deep sea and to obtain sediment samples from there. ABISMO consists of a launcher and a vehicle which is launched from the launcher and surveys on the seabed to determine the place for sampling. Core sampling system, which is exchangeable with a gravity piston type or a grab type, is equipped in the launcher. The both of the launcher and the vehicle have cameras to observe. One of the features of ABISMO is that the vehicle has crawlers in addition to thrusters in order to advance mobility. ABISMO is operated with the support ship KAIREI and dived by means of its onboard equipment including a primary cable. We conducted sea trials in January and September 2007 at the areas with the water depths up to 1,300m in Sagami Bay as primary function tests. And we conducted the third sea trial at Izu-Ogasawara trench in December 2007 and made the successful results of diving to the depths up to 9707 m and obtaining a sediment sample from the seabed in 9760 m water depth. This paper describes the features and the outline of ABISMO as well as the sea trial results.
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