Osamu Koyama

Director/Board Member at

Keimei Gakuen

78 year

8 connections

Finance

Process Industries

Producer Manufacturing

Profile

Osamu Koyama is currently Managing Director at Keimei Gakuen since 2013 and Auditor at International University of Japan since 2017.
Former positions include Director & Senior Executive Officer at T&D Holdings, Inc., Director & Senior Executive Officer at Daido Life Insurance Co., President & Representative Director at Mitsui & Co. Global Strategic Studies Institute, Independent Outside Director at Asahi Diamond Industrial Co., Ltd. from 2014 to 2026, and Executive Managing Officer at Mitsui & Co., Ltd.

Osamu Koyama active positions

Companies	Position	Start
Keimei Gakuen	Director/Board Member	01/01/2013
International University of Japan International University of Japan Other Consumer ServicesConsumer Services Functions as a College/University	Comptroller/Controller/Auditor	01/04/2017

All active positions of Osamu Koyama

Former positions of Osamu Koyama

Companies	Position	End
ASAHI DIAMOND INDUSTRIAL CO., LTD.	Director/Board Member	26/06/2026
Mitsui & Co. Global Strategic Studies Institute Mitsui & Co. Global Strategic Studies Institute Miscellaneous Commercial ServicesCommercial Services Operates research institute	President	-
Daido Life Insurance Co. Daido Life Insurance Co. Life/Health InsuranceFinance Provides enterprise life insurance services	Director/Board Member	-
MITSUI & CO., LTD.	Corporate Officer/Principal	-
T&D HOLDINGS, INC.	Director/Board Member	-

See the detail of Osamu Koyama's experience

Experiences
Positions held

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Inactive

Listed companies

Private companies

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Connections

1st degree connections

1st degree companies

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Members of the board

Executives

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Linked companies

Private companies	7
Mitsui & Co., Ltd. Mitsui & Co., Ltd. Chemicals: Major DiversifiedProcess Industries Manufactures chemicals and engages in the sale, import, export of industrial materials, raw iron, nonferrous metal, chemical, energy and food	Process Industries
T&D Holdings, Inc. T&D Holdings, Inc. Life/Health InsuranceFinance Provides life insurance services	Finance
Daido Life Insurance Co. Daido Life Insurance Co. Life/Health InsuranceFinance Provides enterprise life insurance services	Finance
Asahi Diamond Industrial Co., Ltd. Asahi Diamond Industrial Co., Ltd. Industrial MachineryProducer Manufacturing Manufactures and distributes diamond tools	Producer Manufacturing
International University of Japan International University of Japan Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Keimei Gakuen
Mitsui & Co. Global Strategic Studies Institute Mitsui & Co. Global Strategic Studies Institute Miscellaneous Commercial ServicesCommercial Services Operates research institute	Commercial Services