Corporate information
Since its founding in 1918, Sanwa Tajima has contributed to the development of modern and contemporary architecture, both domestically and overseas, as a pioneer in architectural metalwork. In addition to creating products from stainless steel, copper alloys such as bronze and brass, and aluminum—including custom-made fittings, ornamental metalwork for interiors and exteriors, and other architectural metalwork—we pursue a broad range of activities, including the restoration and repair of the metal parts of modern and contemporary buildings and other metal artworks.
Company Profile
Company name | Sanwa Tajima Corporation |
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President and representative director |
Toshihiro Shinomiya |
Head Office | Forum IS Building, 2-77-5 Ikebukuro, Toshima-ku, Tokyo |
Establishment | June 1918 |
Incorporation | October 1938 |
Business | design, manufacture, installation, construction, and sales of architectural metalwork |
Fiscal year-end | March 31 |
Number of employees | 270 (as of March 2024) |
Capital | 100,000,000 yen |
Number of shares issued | 460,000 shares |
Shareholder | Sanwa Holdings Corporation (100% owner) |
Affiliated Group Companies | Sanwa Holdings Group Network |



History of
Sanwa Tajima
1918 | Manufacture of the first architectural metalworks and metal artworks in Japan begins under the leadership of Junzo Tajima (founder and first president). |
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1938 | Reorganized as a joint-stock company |
1954 | Osaka branch Office established |
1957 | Nagoya branch Office established |
1961 | Moroyama Factory opens at Moroyamamachi, Saitama. |
1965 | Nagoya Factory opens at Inuyama city, Aichi. |
1979 | Main factory moved to Moroyama Factory and designated as Saitama Factory. |
1999 | Becomes a group company of Sanwa Shutter Corporation. Head Office moves to Ikebukuro, Toshima-ku, Tokyo. |
2006 | As part of the reorganization of Sanwa Shutter Corporation, Company renamed Sanwa Tajima Corporation and integrates production and sales. |
2007 | With the reorganization of Sanwa Shutter Corporation, Sanwa Tajima becomes a Sanwa Holdings Corporation group company. |
2018 | Marks its 100th year in business |
2025 | Merged with group companies Yoshida Seisakusho Co., Ltd. and Metalwork Kansai Co., Ltd. |


