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1924 Mr. Shinji Shibayanagi founded Okajima Iron Works.
1934 Started Japan's first mass production of engine valves by purchasing an electric upsetter from West Germany.
1937 Founded Nihon Tanko Co., Ltd. and amalgamated with Okajima Iron Works.
1945 Constructed and started Hadano Plant to scale up the production of hollow engine valves for airplanes.
1948 Established Nittan Valve Manufacturing Co., Ltd. after separating from former Nihon Tanko Co., Ltd. in accordance with the Enterprise Reorganization Act.
1960 Constructed a cutting-edge machining plant in Shimizu-cho, Hadano-shi, Kanagawa (First rationalization program).
1961 Changed the company name to Nittan Valve Co., Ltd. (Capitalized at ¥70 million.)
1962 Listed on the second section of the Tokyo Stock Exchange.
Acquired land in Soya, Hadano-shi, Kanagawa Prefecture and constructed a new plant and started full-fledged mass production of automobile valves (Second rationalization program).
1963 Entered into technical cooperation for forged gear manufacturing with BLW (West Germany).
1965 Constructed and started up Gear Plant in Hadano. (Capitalized at ¥180 million.)
1966 Relocated head office to Yaesu, Chuo-ku, Tokyo.
1969 Formed a joint venture company, Taiwan Nittan Industrial Co., Ltd. (currently a consolidated subsidiary) in Taiwan; offered technical cooperation for engine valve manufacturing. (Capitalized at ¥330 million.)
1971 Increased capital to ¥550 million.
1978 Entered into technical, capital, and sales cooperation with Eaton Corporation (USA).
1982 Increased capital to ¥750 million.
1983 Constructed building of Sanyo plant and started its small engine valve production (Capitalized at ¥830 million.)
1984 Increased capital to ¥870 million.
1986 Installed forging machines at Taiwan Nittan Industrial Co., Ltd. (currently a consolidated subsidiary) and established an integrated production system from raw materials to finished products.
1988 Established an investment company, U.S. Engine Valve Corporation (currently a consolidated subsidiary) in Ohio, USA.
Formed a joint venture company, U.S. Engine Valve (Partnership) (currently a consolidated subsidiary) in South Carolina, USA with investment from Eaton Corporation and U.S. Engine Valve Corporation.
1989 Public stock offerings increased capital to ¥2,140 million.
1990 Conversion of convertible bonds increased capital to ¥3,790 million.
1995 Formed a joint venture company for hydraulic valve lifter manufacture, Shinhwa Precision Co., Ltd., in Korea.
Formed a joint venture company for engine valve manufacture, PT. Federal Nittan Industries (currently a consolidated subsidiary), in Indonesia.
1997 Formed a joint venture company for engine valve manufacture, Nittan (Thailand) Co., Ltd. (currently a consolidated subsidiary), in Thailand.
2000 Relocated head office to Hadano-shi from Yaesu, Chuo-ku.
2003 Established Guangzhou Nittan Valve Co., Ltd. (currently a consolidated subsidiary) in China with investment from Taiwan Nittan Industrial Co., Ltd.
2004 Established Beijing Yoosung Shinhwa Automobile Part Co., Ltd. with investment from Shinhwa Precision Co., Ltd.
2006 Relocated Marine Plant from Shimizu-cho to Horiyamashita in Hadano-shi as part of Hadano redevelopment project.
2007 Established an office building in Head Office/Hadano Plant to integrate indirect departments as part of Hadano redevelopment project.
2008 Reconstructed organization as part of business strategy for global expansion.
Transferred partial share of Shinhwa Precision Co., Ltd. (changed from consolidated subsidiary to equity method affiliate) and increased capital ratio of U.S. Engine Valve (Partnership) (changed to consolidated subsidiary).
Established Nittan Global Tech Co., Ltd. (currently a consolidated subsidiary), being tasked with managing global expansion, with investment from Eaton Corporation.
Formed a joint venture company for engine valve manufacture, Nittan Euro Tech sp. z o.o. (currently a consolidated subsidiary) in Poland with investment from Eaton Corporation.
Third-party stock placement increased capital to ¥4,530.543 million.
2009 Established a joint venture company for marine and land engine valve manufacture, KN-Tech Co., Ltd. in Korea.
2012 Established a joint venture company for engine valve manufacture, Nittan Vietnam Co., Ltd. (currently a consolidated subsidiary) in Vietnam.
Established a joint venture company, Shinhwa Takahashi Press Co., Ltd., with Takahashi Techno Co., Ltd. and Shinhwa Precision Co., Ltd., aimed at manufacture and distribution of raw materials for valve lifters in Korea.
2013 Established Nittan Korea Co., Ltd. for distribution and maintenance of Nittan Valve products in Korea.
Established Nittan India Tech Pvt. Ltd. (currently a consolidated subsidiary) for engine valve manufacturing in India.
2014 Established Rizhao Yoosung Shinhwa Automobile Part Co., Ltd. with investment from Shinhwa Precision Co., Ltd., aiming at manufacture and distribution of valve lifters in China.
2015 Established Shune 365 Co., Ltd. (currently a consolidated subsidiary), engaged in production, processing, and distribution of agricultural crops in Hirasawa, Hadano-shi.
2018 Established Rizhao Nittan Valve Co., Ltd.(Currently a consolidated subsidiary) for engine valve manufacturing in China.
2019 Tokyo Office was renamed Tokyo Headquarters, for the purpose of transition to two-head-office structure.
2021 Established a joint venture company, Rizhao SP Automobile Parts Co.,Ltd. with Yoosung Enterprise Co., Ltd. and Cooper (China) Co., Ltd. aimed at manufacture and distribution of valve lifters in China.
2022 Changed the company name to NITTAN Corporation.
Shifted to the Standard Market due to the restructuring of the market classification of the Tokyo Stock Exchange.