History
1920
-
1928
Establishment of Kawaguchi Rubber Works (Katsushika-ku, Tokyo)
1940
-
1943
Incorporation of Kawaguchi Rubber Works Co., Ltd. (Katsushika-ku, Tokyo)
-
1947
Successfully commenced manufacturing of Japan’s first vinyl chloride products
1950
-
1950
Rebuilt factory to fully convert to vinyl chloride processing lines
-
1952
Introduced first four calenders for vinyl chloride in Japan
-
1959
Osaka Sales Office opened (currently Osaka Branch)
1960
-
1960
Gamo plant established (Koshigaya-shi, Saitama)
-
1961
Tokyo Sales Office opened (Chiyoda-ku, Tokyo)
-
1962
Listed in the Second Section of the Tokyo Stock Exchange (Capital 153 million yen)
-
1963
Central Research Facilities opened (Katsushita-ku, Tokyo)
-
1968
Tsuchiura Plant (currently Tsuchiura Works) founded (Tsuchiura-shi, Ibaraki)
1970
-
1970
Lonseal waterproofing adopted for Osaka World Expo Pavilion
-
1972
Name changed to Lonseal Corporation
-
1972
Construction material sales company LONSEAL INC. established in California,
U.S.A. (currently consolidated subsidiary)
-
1973
Osaka sales office becomes Osaka Branch
-
1975
Main Plant (Katsushika-ku, Tokyo) relocated and merged with Tsuchiura Plant
1980
-
1980
Okayama Plant established (Okayama Prefecture)
-
1984
Gamo Plant relocated and merged with Tsuchiura Plant
-
1985
Head Office Relocated (Chiyoda-ku, Tokyo)
-
1988
To mark the 60th year of foundation, the CI catchphrase “Creating Beautiful Living Spaces with Science” was adopted
1990
-
1990
New Headquarters Building Complete
Head Office Relocated (Sumida-ku, Tokyo)
-
1995
Okayama Plant relocated and merged with Tsuchiura Plant
-
1996
Shares acquired in Japan Equipment Co., Ltd. (Lontechno Kinki Co., Ltd.)
-
1996
The first company in the vinyl chloride manufacturing industry in Japan to acquire ISO9001
-
1997
Shares acquired in Kogensha Co., Ltd. (Lontechno Tokyo Co., Ltd.)
-
1998
Incorporation of Lon-S Co., Ltd.
2000
-
2007
Acquisition of ISO14001 Certification
-
2009
Lon-S Co., Ltd. dissolved
2010
-
2010
Lontechno Tokyo Co, Ltd. merges with Lontechno Kinki Co., Ltd., Corporate
name changed to Lontechno Co., Ltd. (currently consolidated subsidiary)
-
2011
Construction material sales company Lonseal (Shanghai) Trading Company established in Shanghai, China (currently consolidated subsidiary)
2020
-
2020
Completed construction of Innovation Center (Tsuchiura Ibaraki)
-
2022
Completed construction of Monozukuri office (Tsuchiura Ibaraki)