Feb. 1964	Established as wholly owned subsidiary of Mitsui Mining & Smelting Co., Ltd., with a company name of “Sankin Kiko Co., Ltd. (Head Office at Chuo-ku, Tokyo. Capital 5 million Japanese Yen)
Apr. 1968	Capital increased to 20 million Japanese Yen
Apr. 1969	Capital increased to 50 million Japanese Yen
Nov. 1970	Trade name changed to Mitsui Kinzoku Engineering Service Company, Limited. Capital increased to 200 million Japanese Yen
Jan. 1971	Opened Tohoku Branch Office in Hachinohe, Aomori
Mar. 1977	Changed English name of company to MESCO, Inc.
Jan. 1985	Moved head office to Sumida-ku, Tokyo
Mar. 1985	Increased capital to 400 million Japanese Yen
May. 1987	Established a local subsidiary MESCO (USA), INC. in the United States of America
Mar. 1988	Capital increased to 480 million Japanese Yen
Aug. 1988	Established MESCO PIPE INDUSTRY CO., LTD. (100% subsidiary)
Sep. 1988	Acquired manufacturing and sales right of polyethylene complex pipe from Mitsui Kinzoku Pipe Industry Co., Ltd.
May 1990	Established a local subsidiary MESCOENG (MALAYSIA) SDN. BHD. in Malaysia (100% subsidiary)
Mar. 1991	Capital increased to 503.6 million Japanese Yen
Jul. 1991	Consolidated MESCO PIPE INDUSTRY CO., LTD.
Mar. 1993	Capital increased to 678.6 million Japanese Yen
Nov. 1994	Established a local subsidiary SIAM MESCO Co., Ltd. in Thailand (49% share holding)
Apr. 1999	Established a local subsidiary TAIWAN MESCO INC. in Taiwan (100% subsidiary)
Mar. 2000	Listed in Tokyo Stock Exchange Section 2 Capital increased to 1,085.35 million Japanese Yen
Feb. 2005	Moved head office to Kinshi, Sumida-ku, Tokyo
Jul. 2006	Acquired engineering business from Mitsui Kinzoku Kyushu Engineering Co., Ltd. and construction/handling system business from Kamika Engineering Co. Ltd.