Maruichi Steel Tube Ltd. Works, Ltd. was established.

The company name was changed to Maruichi Steel Tube Ltd.

Tokyo Plant established.

The company was listed on the stock exchange.

Sakai Plant established.

Nagoya Plant established (integrated into the current Nagoya Plant in 1984).

Hokkaido Maruichi Steel Tube Ltd. was established.

Sakai Pole Plant established.
PT Indonesia tubes Co., Ltd. (ISTW) begins operations.

Tokyo No. 2 Factory (currently Tokyo Plant) established.

Shikoku Maruichi Steel Tube Ltd. was established.
Kyushu Maruichi Steel Tube Ltd. was established.

Nagoya No. 2 Factory (currently Nagoya Plant) established.

[USA] Maruichi American Corporation (MAC) is established.

Takuma Plant opened.

Established Kashima Pole Plant .

[China] Maruichi Metal Products (Foshan) Co., Ltd. (MMP) was established.

[Vietnam] Acquired equity stake in Sun Steel Corporation (SUNSCO).
Acquired shares in Toyo Superior Steel Tube Works, Ltd.

[USA] Acquired an interest in Leavitt Tube Company, LLC (Leavitt).

Alpha Metal Co., Ltd. becomes a subsidiary.
[India] Acquired equity interest in KUMA STAINLESS TUBES LIMITED (KUMA).

[Mexico] MARUICHIMEX SA de CV (MMX) is established.

[USA] Maruichi Oregon Steel Tube, LLC (MOST) is established.

[Philippines] MARUICHI PHILIPPINES STEEL TUBE INC. (MPST) is established.

Acquired shares in Kobelco tubes Co., Ltd. (currently Maruichi Stainless Tube Co., Ltd.).

[USA] Acquired Geneva Structual Tubes, LLC (MNT).

[USA] MARUICHI Stainless Tube Texas Corporation (MST-X) is established.

Toyo Superior Steel Tube Works, Ltd. becomes a consolidated subsidiary.

Acquired shares of SATO KATAKO SEISAKUSHO CO.LTD.