525
+2.74%
Close of 9 Nov 2026, in JPY
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About Sumiseki Holdings
Its shares trade on Tokyo Stock Exchange under the ticker 1514.T. It has been listed since 1 October 2008. In the fiscal year to 31 March 2026, it reported revenue of ¥10.66bn and net income of ¥2.64bn. At that date it held total assets of ¥32.19bn and shareholders' equity of ¥29.15bn.
Sumiseki Holdings, Inc. engages in the manufacture and sale of coal products, artificial diamonds, and crushed stones. The company is headquartered in Minato-Ku, Tokyo-To. The company went IPO on 2008-10-01. is a Japan-based holding company mainly engaged in coal business. The firm has three business segments. The Coals segment purchases and sells coals. The New Materials segment is engaged in the manufacture, purchase and sale of artificial diamonds for industrial use. The Quarry segment is engaged in the mining, processing and sale of crushed stone.
Figures and description from our data supplier, not checked against the company's own report.
Company facts
- Sector
- Industrials
- Industry
- Trading Companies & Distributors
- Listed since
- 1 Oct 2008
- Employees
- 45
- Website
- sumiseki.co.jp ↗
Leadership
Pay as last reported
- Mr. Shosuke MoriPresident, Executive President, Representative Director, since 2023
- Mr. Komaki NagasakiPresident, Executive President, Chairman and President of Subsidiaries, Representative Director, since 2008
- Mr. Yoshinori MiyazawaExecutive Officer, Director of Finance, Director of General Affairs, Director
- Mr. Kazunari IsobuchiExecutive Officer, Director, since 2023
- Mr. Keiji IshiiExecutive Officer, Manager of Audit Office
- Mr. Hiroshi MaedaExecutive Officer
- Mr. Yutaka NakazonoExecutive Officer
- Mr. Masayuki NotoyaExecutive Officer, since 2016
- Mr. Masato TaniExecutive Officer
- Mr. Noboru YamatoExecutive Officer, Director of General Affairs
- Mr. Iwao AsoDirector
- Mr. Hiroshi NoguchiDirector
Environmental, social and governance
Scores out of 100, from our data supplier
- Overall
- 0
- Environment
- 0
- Social
- 0
- Governance
- 0
SWOT analysis
AI-generated by our data supplier. Not written or checked by our editors.
Strengths
- Sumiseki Holdings operates three distinct business segments including coals and artificial diamonds.
- The company manufactures and sells artificial diamonds for industrial use applications.
- Sumiseki Holdings employs 45 full-time staff members across its operations.
Weaknesses
- The firm has a small workforce of only 45 employees total.
- Sumiseki Holdings is listed on the market since October 2008.
- The company is headquartered in Minato-ku, Tokyo-To, Japan.
Opportunities
- The New Materials segment can expand artificial diamond sales globally.
- Sumiseki Holdings can increase crushed stone sales through the Quarry segment.
- The Coals segment may grow by purchasing more coal supplies.
Threats
- Market fluctuations could impact the sale of coal products significantly.
- Competition in the artificial diamond manufacturing sector remains intense.
- Regulatory changes in Japan may affect the quarrying operations.
Sources and methodology
- Data on this tab
- Our data supplier
- Chart on the Overview
- TradingView
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