TOSTEM JapaneseChinese
Company Profile
Tostem's vision
Message from President
Corporate Information
Business Description
Approach of product development
Manufacturing process
Global Network
Corporate History

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JS Group
Corporate History
Foundation
1923
Myokenya, a retail fixtures dealership, established in Tokyo
1949
Incorporation
High-growth period
1971
Six sales companies integrated and Toyo Sash Co., Ltd. established
1974
TOYO EXTERIOR CO., LTD. established. The Group expanded into the housing exterior business
Shift focus to value-added products
1977
VIVA HOME CORPORATION (later TOSTEM VIVA CORPORATION) established, and the Group expands into the home center business
1984
EYEFUL HOME INC. (later EYEFUL HOME TECHNOLOGY INC.) established and the Group enters a franchise management for small and medium-sized builders
Promoting "Total Housing" vision
1984
Toyo Sash Co., Ltd. announced the new logo, TOSTEM
1985
Toyo Sash Co., Ltd. listed on the Second Section of the Tokyo Stock Exchange
Mitsui Light Metal Processing Co., Ltd., a large manufacturer of building windows, joined the Group
Dai-ichi Mokko Co., Ltd. acquired
Meiwa manufacturing Co.,Ltd. (now Tostem Kani Co., Ltd.) and Meiwa Co.,Ltd. acquired
Nittetsu Curtainwall Corporation and Nittetsu Sash Sales Corporation join the Group
1986
TOYO EXTERIOR CO., LTD. listed on the Second Section of the Tokyo Stock Exchange
Sanyo Chemical Manufacturing Co., Ltd. acquired
1987
VIVA HOME CORPORATION listed on the Second Section of the Tokyo Stock Exchange
Tostem Thai Co., Ltd. established
1988
Toyo Sash constructs new headquarters in Koto-ku, Tokyo
1990
Alnasash Co., Ltd. (now Tostem Ibuki Co., Ltd.) acquired
1992
Tostem HomeWell chain of franchised renovation shops launched
Company name changed to TOSTEM CORPORATION
TOSTEM SHOWROOM TOKYO opened
TOSTEM Building Materials Industry Promotion Foundation established
1995
TOSTEM SHOWROOM OSAKA opened
“Super Wall” and “Super Shell” construction methods introduced
1999
JIO established by 11 companies, including TOSTEM
2000
SUZUKI SHUTTER MANUFACTURING CO., LTD. joins the Group
2001
Tostem Inax Holding Corporation established by spinning off the new TOSTEM CORPORATION as an operating company
Inax Corporation becomes wholly owned subsidiary of Tostem Inax Holding Corporation
TOSTEM GARDENING CORPORATION established
2002
Production and logistics operations of TOYO EXTERIOR absorbed into TOSTEM CORPORATION
The plant of TOSTEM HOUSING PRODUCTS (DALIAN) CO., LTD. in Dalian, China, which produces wooden interior furnishings, completed
Kinki Sharyo Co., Ltd.'s construction materials sales division is absorbed into the Tostem Group (TOSTEM SD established)
TOSTEM INAX REMODELING CORPORATION established by integrating commercial building renovation business within the Group
ROOF TOSTEM Co., LTD. established
2003
All companies of the TOSTEM Group obtained ISO 14001 certification
Nihon Kentetsu Engineering acquired and name changed to TOSTEM KENTETSU CORPORATION
2004
Tostem Research and Development Center established
“Reform Magic”, a network of renovation contractors providing remodeling support services, begins operations
2005
Asahi Tostem Exterior Building Materials Co., Ltd., a joint venture with Asahi Glass Co., Ltd., commences operations
Tostem forms sales alliance with Mitsubishi Shoji Construction Materials Corporation for the sustainable building material "Moiss"
2006
TOSTEM KENTETSU CORPORATION absorbed into TOSTEM CORPORATION
2007
TOSTEM INAX REMODELING CORPORATION absorbed into TOSTEM
2009
JS GROUP SENIOR LIFE CORPORATION absorbed into TOSTEM LG-TOSTEM BM Co., Ltd. established jointly with LG Chem, Ltd. of the LG Group of South Korea
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