Iida Sangyo Co., Ltd.
| 1977 | July : Company established with capital stock of 30 million yen |
|---|---|
| 1982 | September : Capital stock increased to 47.5 million yen |
| 1986 | August : Aobadai Branch Office opened |
| 1987 | July : Ageo Branch Office opened |
| 1988 | March : Utsunomiya Branch Office opened |
| 1994 | July : Capital stock increased to 73.7 million yen |
| 1995 | April : Haijima Sales Office opened |
| 1996 | April : Capital stock increased to 233 million yen |
| April : Matsudo Sales Office opened | |
| 1997 | April : Capital stock increased to 578 million yen |
| April : Omiya Branch Office opened | |
| May : Koiwa Sales Office opened | |
| October : Kashiwa Branch Office opened | |
| 1998 | February : Shin-Yokohama Branch Office opened |
| August : Fuchu Sales Office opened | |
| 1999 | September : Kawaguchi Sales Office opened |
| October : Funabashi Sales Office opened | |
| November : Utsunomiya Central Sales Office opened | |
| 2000 | February : Stocks listed on the OTC market |
| February : Capital stock increased to 1.1305 billion yen | |
| September : Nerima Sales Office opened | |
| December : Soka Sales Office opened | |
| 2001 | February : Ayase Sales Office opened |
| March : Miyazakidai Sales Office opened | |
| April : Listed on the Second Section of the Tokyo Stock Exchange | |
| July : Higashimurayama Sales Office opened | |
| 2002 | April : Listed on the First Section of the Tokyo Stock Exchange |
| November : Koshigaya Sales Office opened | |
| November : Motoyawata Sales Office opened | |
| 2003 | November : Ryokuentoshi Sales Office opened |
| 2005 | March : Shizuoka Sales Office opened |
| 2006 | February : Enoshima Sales Office opened |
| February : Kasukabe Sales Office opened | |
| May : Shizuoka South Sales Office opened | |
| 2007 | April : Miraidaira Sales Office opened |
| May : Nagoya Sales Office opened | |
| May : Nagoya East Sales Office opened | |
| May : Numazu Sales Office opened | |
| 2010 | September : Miyazakidai Sales Office changed its name to Saginuma Sales Office |
| 2011 | March : Kichijoji Sales Office opened |
| May : Kiyose Sales Office opened | |
| July : Capital Stock increased to 2 billion yen | |
| July : Urawa Sales Office, Totsuka Sales Office and Sendai Sales Office opened | |
| November : Chiba Sales Office, Sagami-Ono Sales Office, Suita Sales Office, Akashi Sales Office and Nishinomiya Sales Office opened | |
| 2012 | February : Kuki Sales Office opened |
| July : Kasugai Sales Office opened | |
| July : Sakurashinmachi Sales Office opened | |
| July : Hachioji Sales Office opened | |
| July : Gotanda Sales Office opened | |
| November : Kawasaki Sales Office opened | |
| November : Nagai Sales Office opened | |
| 2013 | May : Tokorozawa Sales Office opened |
| July : Nagareyama Sales Office opened | |
| July : Kariya Sales Office opened | |
| August : Akashi Sales Office changed its name to Kobe Sales Office | |
| October : Ayase Office changed its name to Ayase East Sales Office | |
| October : Ayase Branch Office opened | |
| October : Ayase Sales Office changed its name to Ayase East Sales Office | |
| October : Tachikawa Sales Office opened | |
| October : Tokiwadai Sales Office opened | |
| October : Sendai Izumi Sales Office opened | |
| October : Machida Sales Office opened | |
| October : Shiki Sales Office opened | |
| October : Delisted on October 29 | |
| November : Iida Group Holdings Co., Ltd. (established due to the integration of six companies including our company listed on the First Section of the Tokyo Stock Exchange | |
| 2014 | May : Suginami Sales Office opened |
| June : Ayase East Sales Office changed its name to Nippori Sales Office | |
| June : Okinawa Sales Office opened | |
| June : Gotemba Sales Office opened | |
| July : Nagai Sales Office changed its name to Itami Sales Office | |
| 2015 | March : Matsuyama Sales Office opened |
| March : Maebashi Sales Office opened | |
| March : Kamata Sales Office opened | |
| April : Mito Sales Office opened | |
| 2016 | March : Shibuya Sales Office opened |
| March : Toyota Sales Office opened | |
| March : Akabane Sales Office opened | |
| April : Tennoji Sales Office opened | |
| April : Ibaraki Sales Office opened | |
| 2017 | April : Okinawa Chubu Sales Office opened |
| June : Fukuoka Sales Office opened | |
| June : Gotenba Sales Office changed its name to Mishima Sales Office | |
| 2019 | March : Toyama Sales Office opened |
| November : Miyazaki Sales Office opened | |
| 2021 | April : Sendai Branch Office opened (Former Sendai Sales Office) |
| September : Ebina Sales Office opened | |
| October : Inzai Sales Office opened | |
| 2022 | September : Esaka Sales Office changed its name to Sakai Sales Office |
| November : Suita Sales Office changed its name to Shin-Osaka Sales Office |
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