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Company Profile / History

Company Profile

Established
September 20, 1956 (founded on February 26, 1946)
Representative Director
President: Shinji Mitani
Capital Stock
2.146 billion yen
Number of Employees
group total 1,138
Business Description
Production and sales of concrete secondary products, manufacture and sale of gravel products, foundation work, rental for revetment
Company Locations
Head Office:
Fukui, Tokyo
Regional Offices:
Kanto, Kansai, Hokuriku
Branch Offices:
Sapporo, Tohoku, Tokyo, Hokuriku, Nagoya, Osaka, Shikoku, Hiroshima, Kyushu
Company Locations:
Sendai, Chiba, Saitama, Yokohama, Nigata, Toyama, Kanazawa, Fukui, Shizuoka, Okayama, Ehime, Saga, Kumamoto, Kagoshima, Okinawa
Factories:
Sapporo, Watari, Ibaraki, Chiba, Kanazu, Shiga, Sakai, Okayama, Kagawa, Kitakyushu, Omuta, Kagoshima
Affiliated companies:

History

September 1956
Established Hokuriku Ishi Industrial Co., Ltd. with capital of 20 million yen at 10 Kamachi Fukui Ikemachi and began production and sale of gravel. Received construction industry registration, began working as contractor for paving work, civil works, etc.
November 1962
Tosho was renamed to Sekisan Industry Co., Ltd. (prior to renaming, Hokuriku Ishi Industrial Co., Ltd.)
Established Kanazu Pile Factory and started production of concrete piles
June 1963
Shares listed on Osaka Securities Exchange Second Section
Established Osaka Sales Office (now Osaka Branch Office)
November 1964
Established Tokyo Sales Office (now Tokyo Branch Office)
July 1971
Established Nagoya Sales Office (now Nagoya Branch Office)
September 1977
Began production of concrete pole products at the Tokyo Pile Factory
March 1983
Tosho was renamed to Mitani Sekisan Co., Ltd (prior to renaming, Mitani Sekisan Industry Co., Ltd.)
May 1985
Established Tokyo Headquarters, moved Head Office functions to Tokyo Headquarters
December 1986
Urawa Leisure Department (for hotels, bowling alleys) renovation completed,
rented to subsidiary Plaza Hotel Urawa KK
March 1990
Omiya Tenant Building “Mitani Building” completed; entered the office building rental business
July 1993
Head office functions moved from Tokyo Head Office to Fukui Head Office
October 1994
Established Shikoku Sales Office Established Kagawa Sekisan
November 1996
Established Okayama Sales Office Established Okayama Sekisan
October 1999
The Environmental Products Division was transferred to Sekisan PC KK.
January 2001
Established Kyushu Branch Office Omuta Sekisan Co., Ltd. Chiba Sekisan Co., Ltd. joined the Group
August 2002
Established Saga Sales Office
December 2002
Established Niigata Sales Office
April 2003
Established Sendai Sales Office Established Tohoku Sekisan
September 2005
Mitani Engineering Co., Ltd. joined the Group
Fukui Systems Co., Ltd. joined the Group
November 2005
Gateway Computer Co., Ltd. joined the Group.
June 2006
Established Kagoshima Koatsu Sekisan Co., Ltd.
July 2006
Established Kagoshima Sales Office
May 2007
Kitakyushu Sekisan Co., Ltd. joined the Group.
January 2009
Established Sapporo Branch Office Established Hokkaido Sekisan
June 2010
TOSMAC-i Co, Ltd. joined the Group
Kanei Co., Ltd. joined the Group
April 2013
Listed shares on the first part of the Osaka Securities Exchange market.
July 2013
Listed shares on the First Section of the Tokyo Stock Exchange.
April 2014
Established Toyama Sales Office
October 2014
Established Okinawa Sales Office
April 2022
Listed shares on Tokyo Stock Exchange Standard Market.
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