Company NameSunouchi Corporation
Headquarters and FactoriesSecond Iron and Steel Complex, 46 Minato, Urayasu-shi,
Chiba 279-0024 Japan
Telephone: +81-47-353-8751 Fax: +81-47-353-5381
Sales OfficesHigashi-Hiroshima Warehouse, Osaka Sales Office, and
West Japan Sales Office
EstablishmentApril 1, 1984
Capital20 million yen
RepresentativeSeiichiro Baba, President


1914:Isaji Takasuka founded a steel material dealer, Takasuka Isaji Shoten Co., Ltd., in Itachibori, Osaka.
1923: Opened Tokyo Branch in Kyobashi, Tokyo.
1928: Renamed as Takasuka Shoten, succeeded by Etsuichi Takasuka, and the head office placed in Tokyo.
1950:Reorganized as Sunouchi Shoten Corporation, with sales offices opened in Omiya and Hachioji.
1965:Constructed a plant in Iron and Steel Complex, Urayasu, and started partial processing and slit processing for CT and H section steel.
1978:Started manufacturing steel end tabs.


1984: Newly established Sunouchi Corporation and separated the manufacturing and sales of end tabs and other products.
1990: Started manufacturing and sales of ceramic tabs and backing materials.
1992: Established West Japan Sales Office and Osaka Sales Office.
1995: The Great Hanshin-Awaji Earthquake led to an increase in demand for backing materials and end tabs.
1996: Imported ceramic tabs and gouging carbons from China.
2002: Started manufacturing and sales of Kadopita, a product developed by Nippon Steel Metal Products Co., Ltd.
2004: Started selling a backup material for vessels jointly developed with WUHAN TIANGAO WELDING CO.,LTD.
2007: Established Rushan City Xuzhisheng Special Ceramics Co.,Ltd., in Shandong Province, China, for the manufacturing of ceramic products.
2008: Established Higashi-Hiroshima Plant for the manufacturing of steel products.
2009: Established Ayase Warehouse.
2011: Expanded Higashi-Hiroshima Plant after the occurrence of the Great East Japan Earthquake.
2016: Started development of ceramic backing materials for reinforcing bar joints.
2017: Started sales of ceramic backing materials for reinforcing bar joints.