| March 1916 |
Established as the only manufacturing company specializing in bicycle chains in the Kansai region.Started manufacturing various types of roller chains. |
| July 1934 |
Reorganized to Izumi Chain Co., Ltd. |
| May 1950 |
Opened Tokyo sales office. |
| November 1954 |
Became a JIS-approved factory for bicycle chains. |
| April 1956 |
Received designation as a corporate rationalization model factory from the Ministry of International Trade and Industry. |
| May 1956 |
Became a JIS-approved factory for transmission roller chains. |
| July 1964 |
Completed new head office building and new factory. |
| June 1965 |
Certified as an export-contributing company by the Minister of International Trade and Industry (and annually thereafter). |
| December 1965 |
Increased capital to 125 million yen. |
| September 1969 |
Introduced and expanded production facilities such as dedicated assembly machines and continuous heat treatment furnaces. |
| July 1971 |
Formed a business alliance with Tsubakimoto Chain Co., Ltd. |
| December 1971 |
Increased capital to 200 million yen. |
| April 1973 |
Established Tsubaki Izumi Sales Co., Ltd. (currently Tsubakimoto Machinery Co., Ltd.) through a joint investment with Tsubakimoto Chain Co., Ltd. |
| March 1974 |
Increased capital to 280 million yen, still in place today. |
| November 1976 |
Started production of a new type of bicycle chain for transmission jointly developed with Shimano Co., Ltd. |
| June 1984 |
Introduced an automatic chain assembly machine. Planned to increase production. |
| October 1984 |
Introduced progressive dies and a dedicated press machine. Planned to increase production. |
| October 1985 |
Started production of narrow chains (burring chains) for Shimano Co., Ltd. |
| March 1988 |
Cooperated with the Osaka Prefectural Enterprise Bureau's Hannan Hills Development Project (soil extraction project for the construction of the new Kansai International Airport). |
| October 1985 |
Introduced a large continuous heat treatment furnace. Planned to expand production. |
| April 1995 |
Started production of a new super narrow chain for Shimano Co., Ltd. |
| June 1998 |
Switched to city gas for LP gas for heat treatment furnaces. |
| June 1999 |
Started introducing robots to chain assembly lines. |
| July 2003 |
Started production of a new type of super narrow chain for Shimano Co., Ltd. |
| March 2005 |
Expanded high-speed automatic precision press for new super narrow chain. |
| April 2007 |
Started production of environmentally resistant chains that comply with the RoHS directive for Tsubakimoto Chain Co., Ltd. |
| October 2007 |
Expanded high-speed automatic precision presses to increase production. |
| April 2008 |
Started production of a new high-grade super narrow chain for Shimano Co., Ltd. |
| January 2009 |
Started production of small chains (small size) for Tsubakimoto Chain Co., Ltd. |
| February 2009 |
Started production of solid bush chains with improved wear life and transmission capacity for Tsubakimoto Chain Co., Ltd. |
| March 2010 |
Acquired ISO 9001:2008 certification. |
| March 2010 |
Introduced an Ultimate Precision Forming Press Machine. |
| May 2010 |
Started production of a new high-grade super narrow chain (new series) for Shimano Co., Ltd. |
| November 2011 |
Started production of a new motorcycle chain for Tsubakimoto Chain Co., Ltd. |
| May 2012 |
Started production of a new high-grade super narrow chain (new series) for Shimano Co., Ltd. |
| August 2015 |
Relocated Tokyo sales office to Koshigaya City, Saitama Prefecture. |
| January 2016 |
Started production of a new grease chain with improved wear life for Tsubakimoto Chain Co., Ltd. |
| March 2016 |
Izumi Chain Co., Ltd. celebrated its 100th anniversary. |
| November 2016 |
Awarded as an excellent tax reporting corporation by the Izumisano Tax Office. |
| May 2017 |
Signed a sponsorship agreement with Izu Velodrome. |
| December 2017 |
Completed PCN factory. |
| January 2019 |
Signed a sponsorship agreement with USA Cycling (U.S.A. Cycling Federation). Began joint development of IZUMI-KAI . |
| April 2020 |
Started sales of IZUMI-KAI track racing chain. |
| June 2020 |
IZUMI MFG VIETNAM CO.,LTD. was established in Vietnam. |
| September 2022 |
Completed new office (Building B) of head office. |
| March 2023 |
Began operation of the Momonokidai factory. |
| May 2024 |
IZUMI MFG VIETNAM CO.,LTD began operation. |
