Nippon Kaiyo Co., Ltd.
Tatsuo Yamashita, President
1,571 million yen (As of March 2023)
Number of Employees
33 (As of March 2023)
5-13-4, Towa, Adachi-ku, Tokyo, 120-0003 Japan
Kure Branch Office
4-3-12, Sanjo, Kure-shi, Hiroshima, 737-0821 Japan
Sales and maintenance of measurement equipment for marine environment.
Design and assembly of diving- related products.
Marine equipment system business.
MUFG Bank, Ltd.
Mizuho Bank, Ltd.
Established Honchigo Co., Ltd.
Company name changed to Nippon Kaiyo Co., Ltd.
Started Business of equipment related to diving and ocean surveillance
Kure Branch Office started
Merged to Asahi Senken Co., Ltd.
Started business related to environmental surveillance
Transferred the business related to environmental surveillance and recycling equipment to Kaiyo Engineering Co., Ltd.
Moved to the Head Office
Started drone related business
Started business of marine equipment system
Japan Ministry of Defense
Japan Maritime Self‐Defense Force
Japan Ground Self-Defense Force
Japan Air Self-Defense Force
Japan Coast Guard
Japan Fisheries Research and Education Agency
Japan Agency for Marine-earth Science and Technology
Mitsubishi Heavy Industries, Ltd.
Mitsui Engineering & Shipbuilding Co., Ltd.
Japan Marine United Corporation
Kawasaki Heavy Industries, Ltd.
PENTA-OCEAN CONSTRUCTION CO., LTD.
TOYO CONSTRUCTION CO., LTD.