| June 1981 | Founded (Omori, Ota-ku, Tokyo) |
|---|---|
| June 1983 | Kyodo Seiko Co., Ltd. established with capital of 6 million yen |
| June 1985 | Moved to Honhaneda, Ota-ku, Tokyo and opened Haneda Factory |
| July 1987 | Capital increased to 10 million yen |
| July 1989 | Trade name changed to KyoDo Co., Ltd. |
| August 1990 | Osaka Sales Office opened (Mizuhai, Higashiosaka) |
| February 1991 | Capital increased to 40 million yen |
| December 1991 | Capital increased to 70 million yen |
| February 1992 | Fukuoka Sales Office opened (Mukaino, Minami-ku, Fukuoka) |
| July 1996 | Head Office moved to Honhaneda, Ota-ku, Tokyo |
| April 1997 | Saitama Sales Office opened |
| September 1998 | Chiba Sales Office opened |
| January 1999 | Osaka Sales Office moved to Yokomakuranishi, Higashiosaka |
| August 1999 | [Head Office (Sales Department)] moved to Higashikamata, [Fukuoka Sales Office] moved to Higashi-ku |
| July 2000 | Fuchu Sales Office opened |
| January 2003 | Factory moved to Kawasaki, Head Office moved to Higashikamata |
| August 2003 | Fuchu Sales Office moved to Kawasaki |
| October 2004 | Factory and Kawasaki Sales Office moved to Totsuka, Yokohama |
| June 2006 | Changed the company name to A |
| June 2006 |
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| June 2006 | Capital increased to 4 million yen |
| October 2010 | Capital increased to 10 million yen |
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