Maps of Osezaki Dive Site, Izu peninsula, Japan

The above three maps furnished by Rie Nakano.

NOTE: This page in re Tomohiko Kurihara's Osezaki dive site in mainland Japan. His Nudibranch Site features numerous opisthobranchs (site in Japanese, but with Latin scientific names).

The following description of the area is taken from the Tokai University Publication Association*:
The area of sea enclosed by a line drawn between Omaezaki and Irozaki on the tip of the Izu Peninsula is the Suruga Bay. Suruga Bay is a relatively small open type bay, the width of the mouth and the depth into the coastline are both approx. 60km and the surface area is approx. 2,300km2, however, the water is deeper than other bays. At its deepest it reaches 2,500m, which makes it the deepest sea in the national waters of Japan. A gorge deeper than 1,000m ranges from south to north in the sea-bed, from the mouth of the bay to the coast giving this bay its characteristic depth, forming the so called Suruga Trough. The black Current at the Suruga Bay offing flows eastwards over the Izu Ogasawara ridge, showing variations caused by rises/falls and movement of the cold water mass at the Enshunada offing. It is said that approx. 1,000 kinds of fish live in the bay. (there are approx. 2,300 kinds of fish in Japan including fresh water species).

The three deepest bays in Japan:

    Order / Name / Depth
  • 1st / Suruga bay (Shizuoka prefecture) / 2,500m
  • 2nd / Sagami bay (Kanagawa prefecture) / 1,500m
  • 3rd / Toyama bay (Toyama prefecture) / 900m
* Tokai University publication association, Oceanographic Society of Japan Coastal Oceanic Research Group. The Mystery of Suruga Bay (edited by Michihira Hoshino). Cooperation from: Numazu city, Fuji city. [ ]

Page Date: 05 May '03
Page Modification Date: 01 Sep '03
Digitally manipulated photo
Copyright © 2003 Robert F. Bolland