Corporate History

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1959	Designated as a 1st class approved plant of rubber covering for propeller shafts, by the Maritime Bureau, Ministry of Transport.
1964	Designated as a 1st class approved plant of rubber covering for propeller shafts, by the Japan Marine Association (Nippon Kaiji Kyokai).
1969	Repair and inspection standard of rubber covering for propeller shafts was established by the Inspection Technology Improvement Commission for Manufacturing Plants.
1970	Manufacturing of rubber covering for propeller shafts up to Φ 620 was approved by the Maritime Bureau, Ministry of Transport, and the Japan Marine Association.
1970	Rubber covering for propeller shafts was approved by the Chinese Marine Association (CR).
1974	Rubber bearings were developed. Sales for marine vessels and pumps were started.
1974	Adopted by Kubota Corporation as rubber bearings for pumps.
1975	Structure of rubber bearings was approved by the Japan Marine Association.
1975	Adopted by Hitachi, Ltd. as rubber bearings for pumps.
1977	Adopted by Takasago Plant, Mitsubishi Heavy Industries, Ltd. as rubber bearings for pumps.
1977	Adopted by DMW Corporation as bearings for pumps.
1977	Rubber bearings were adopted to the supply vessels of the Defense Agency.
1978	Rubber bearings were adopted to the escort vessels of the Defense Agency, and became the standard specification from that time.
1980	Development of PTFE bearings was started.
1980	Adopted by Ebara Corporation as rubber bearings for pumps.
1981	Rubber bearings were adopted to patrol boats of Japan Coast Guard, and became the standard specification from that time.
1982	PTFE bearings were adopted to escort vessels of the Defense Agency, and became the standard specification from that time.
1982	The vulcanization can exclusively used for propeller shaft rubber covering was renewed. Manufacturing of a shaft with a flange diameter of Φ 1700, total length of 20 m became possible.
1986	PTFE bearings were adopted to circulating water pumps of the Higashi-Ohgishima Thermal Power Station, Tokyo Electric Power Company.
1986	Structure of PTFE bearings was approved by the Japan Marine Association.
1988	PTFE bearings were adopted to a large ferry (“New Akashia” of Shin Nihonkai Ferry) for the first time.
1989	PTFE bearings were adopted to patrol boats of Japan Coast Guard, and became the standard specification from that time.
1991	The rubber bearings and PTFE bearings were introduced as products for marine vessels at the symposium of the Japan Institute of Marine Engineering.
2003	The PTFE bearings were introduced to the Society of Naval Architects and Marine Engineers, for the first time abroad.
2003	Production equipment; two units of 10 ton overhead cranes were replaced by two units of 20 ton overhead cranes.
2003	Design of PTFE bearings was approved for the ABS ship classification. (Up to an inside diameter of Φ 1000)
2004	Review of the repair standard of rubber covering for propeller shafts was approved by Chugoku District Transport Bureau, Ministry of Land, Infrastructure, Transport and Tourism.
2006	PTFE bearings were adopted to “Shirase,” the Antarctic research vessel of the Ministry of Education, Culture, Sports, Science and Technology. They were the largest water-lubricated bearings in Japan. (Φ 810)
2007	It was decided to adopt PTFE bearings to the “Norwegian Epic,” a 15,000 ton cruise passenger vessel.
2008	The achievement of “Research for damage of the shaft sleeve in the seawater-lubricated rubber bearings” was reported to The Japan Institute of Marine Engineering, which was a collaborative research with Mitsubishi Heavy Industries, Ltd. It received the Article Award.

1959