National Land Numerical Information http://nlftp.mlit.go.jp/ksj-e/index.html
Ministry of the Environment.. 2011. The Marine Biodiversity Conservation  Strategy. 
https://www.env.go.jp/nature/biodic/kaiyo-hozen/pdf/pdf_pf_eng_all.pdf
<Pisces> 
GBIF  (The Global Biodiversity Information Facility )data portal.  (www.gbif.org/)IUNC Red List: IUCN. 2012. The IUCN Red List of Threatened  Species. (http://www.iucnredlist.org/)Japan 
Fisheries  Research and Education Agency. Resource evaluation of 52 and 84 groups fish  species http://abchan.job.affrc.go.jp/(in Japanese)
Nakaya,  K. 2011. SHARK Kings of the ocean. Bookman sha co.,Ltd. 237pp. (in Japanese)
OBIS (Ocean Biogeographic  Information System): OBIS. 2012. Data from the Ocean Biogeographic Information  System. Intergovernmental Oceanographic Commission of UNESCO.  (http://www.iobis.org.) 
<Intermediate Cold Water  of Sea of Okhotsk (cold-water belt)> 
Ishizu,  M., Y. Kitade and M. Matsuyama, 2008. Characteristics of the cold-water belt  formed off Soya Warm Current, Journal of Geophysical Research, 113.
<Chlorophyll a > 
NEO (NASA  Earth Observations.
http://neo.sci.gsfc.nasa.gov/Search.html
<Ocean current> 
Coastal  Oceanography Research Committee of the Japan Oceanographical Society of Japan  ed. 1985. Coastal Oceanography of Japanese Islands. Tokai University Press.  1106 pp. (in Japanese)
Ishizu M., Y. Kitade and M. Matsuyama 2008.  Characteristics of the cold-water belt formed off Soya Warm Current, Journal of  Geophysical Research, 113.
Shima,  K., F. Seki, M.Maeda, S. Kimura, H. Saeki, K. Sakuramoto, Y. Suenaga, A.  Nagano, T. Morinaga, N. Yagi, and H. Yamanak, eds. 2012. Fisheries Handbook,  completely revised. Kodansya, Tokyo. 720pp.  (in Japanese)
Tuzuki,  T. and T. Nakao, 1986. Environmental Characteristics the place where natural  upwelling current occur. Suisan-doboku, 22(2): 41-58. (in Japanese)
<other data>
Marin IBA:Birdlife  International 2012. Marine e-atlas.http://54.247.127.44/marineIBAs/ (in Japanese)
Ministry of the  Environment.. 2011. The Marine Biodiversity  Conservation Strategy. 
https://www.env.go.jp/nature/biodic/kaiyo-hozen/pdf/pdf_pf_eng_all.pdf