1936 Tokyoku Kogyo Co., Ltd. is established with capital of ¥500,000 as a sister company of Tokai Carbon Co., Ltd. (former Tokai Electrode Manufacturing Co., Ltd.) for the research and manufacturing of refractory bricks.
1938 Tokyoku Kogyo Co., Ltd. is renamed Tokyoku Sangyo Co., Ltd., establishes the Nagoya Plant, and starts manufacturing refractory bricks.
1946 Tokyoku Sangyo Co., Ltd. is renamed Tokai Konetsu Kogyo Co., Ltd. (hereafter, the "Company").
1947 The Company obtains the rights to manufacture and sell EREMA SiC heating elements and EREMA ceramic resistors and starts manufacturing at the Nagoya Plant.
The Company establishes the Kyoto Plant and starts manufacturing EREMA electric furnaces, DIALITE (SiC refractories), and DALMITE (fused alumina refractories).
1961 The Company forms a technology alliance with Carborundum Abrasives Co. of the United States for SiC heating elements and ceramic resistors. The Company is listed on the Second Section of Tokyo Stock Exchange and the Nagoya Stock Exchange.
1964 The Company establishes the Sendai Plant in Shibata-machi, Miyagi, and starts manufacturing ceramic resistors.
1968 The Company starts manufacturing protection tubes at the Nagoya Plant.
1971 The Company starts manufacturing catalyst carrier production at the Nagoya Plant.
1976 The Company begins manufacturing gas combustion furnaces at the Kyoto Plant.
1977 The Company starts manufacturing silicon nitride-bonded SiC refractories at the Kyoto Plant.
1983 The Company starts manufacturing RECRYTE (SiC ceramic high-temperature materials) at the Kyoto Plant.
1985 The Company starts production of pressure degreasing furnaces and vacuum gas replacement ultra-high temperature furnaces at the Kyoto Plant.
1986 The Company celebrates its 50th anniversary and relocates its head office from Kanda to Shinjuku.
1988 The Company starts manufacturing far-infrared heating elements at the Sendai Plant.
1991 The Company forms a technical tie-up with ULVAC, Inc. for vacuum heat treatment furnaces.
1994 The Company demerges its industrial furnace and heating equipment manufacturing division and establishes TK Engineering Co., Ltd.
1995 TK Engineering Co., Ltd. starts mass production of multilayer ceramic capacitor firing furnaces.
1997 The Company acquires ISO 9001 certification for EREMA SiC heating elements, RECRYTE, and catalyst carriers.
The Company establishes Shanghai Tokan Ceramics Co., Ltd. as a base for heating element and high-temperature material production, in a joint venture with Kanthal of Germany.
1999 Shanghai Tokan Ceramics Co., Ltd. starts manufacturing heating elements. The Company dissolves the joint venture with Kanthal, and as a result, Shanghai Tokan Ceramics Co., Ltd. becomes the Company’s wholly owned subsidiary.
2003 The Company mergers with and absorbs TK Engineering Co., Ltd., closes sales offices in Kyushu and Sendai, and establishes the Kyoto Branch Office. The Company relocates its head office from Shinjuku to Ueno and delists its stock from the Nagoya Stock Exchange.
2004 Shanghai Tokan Ceramics Co., Ltd. is renamed Shanghai Tokai Konetsu Co., Ltd. ISO 14001 certification is acquired by the whole company.
2005 The EREMA SiC heating element manufacturing division is transferred to the Sendai Plant. The Nagoya Plant is renamed the Tokai Konetsu Techno Center, an integrated research center. The industrial furnace and heating equipment manufacturing division is transferred from the Kyoto Plant to the Tokai Konetsu Techno Center. (The Kyoto Plant is closed.)
2006 The Company becomes a wholly owned subsidiary of Tokai Carbon Co., Ltd. under a share exchange agreement and delists its stock from the Tokyo Stock Exchange.
2007 The Company extends the scope of its ISO 9001 certification for EREMA ceramic resistors.
Shanghai Tokai Konetsu Co., Ltd. acquires ISO 9001 certification.
2008 The Company starts manufacturing RECRYTE TN (silicon nitride sintered component) at the Sendai Plant.
2009 The RECRYTE manufacturing division is transferred to the Sendai Plant.
2010 The Company extends the scope of its ISO 9001 certification for RECRYTE and RECRYTE TN.
2011 The Company acquires ISO 9001 certification for industrial furnaces and heating equipment.
2013 The Company establishes Tokai Konetsu (Suzhou) Co., Ltd., a joint venture with HUIKE (China), as a base for manufacturing industrial furnaces and heating equipment.
2014 The industrial furnace and heating equipment manufacturing division is transferred to Tokai Konetsu Engineering Co., Ltd. (The Tokai Konetsu Techno Center is closed.)
2016 The Company discontinues manufacturing of RECRYTE TN (silicon nitride sintered components).
2018 The Company relocates its head office from Ueno to Aoyama.
2024 The Company mergers with and absorbs Tokai Konetsu Engineering Co., Ltd.