| 1946 June | Tokio Itano established “Itano Screw Shop” in Okayamada-cho |
| 1947 September | Moved to Kousei-cho, Okayama-city |
| 1953 November | Changed the structure to limited company to be “Itano Kikou Shop Co., Ltd.” |
| 1974 May | Moved to Imabou, Okayama-city |
| 1976 February | Established “Mizushima branch” in Minamise, Okayama-city |
| 1994 September | Tokio Itano stood down to Chairman and Koichi Itano took up a post as Managing Director |
| 2000 June | ISO9002 certification has been approved (HQ) |
| 2001 October | Masamitsu Itano took up a post of Managing Director and Kouichi Itano became Chairman |
| 2001 December | ISO9002 extended certification was approved (Mizushima branch) |
| 2002 December | ISO14001 certification was approved (HQ and Mizushima branch) |
| 2003 October | ISO9001:2000 certification was approved |
| 2010 July | ISO9001 was revised on 2008 edition |
| 2012 February | Became certified as Excellent Quality Management Factory by Seirei Kogyo |
| 2012 April | Naramura Kogyo Co.,Ltd. became 100% subsidiary |
| 2015 July | Kyushu branch was established in Chikugo-city, Fukuoka-pref |
| 2016 February | New HQ building was completed |
| 2016 May | Production started in the new factory attached to the new HQ building |
| 2016 Jun | PT Matsumura Itano, joint venture in Indonesia started the operation |
