| 1972 | Ken Corporation Ltd, established |
|---|---|
| 1975 | Real Estate Dept. established |
| 1979 | Ken Real Estate Lease Ltd. established |
| 1985 | Opening of Kichijoji Branch Office Leasing Dept. established |
| 1986 | Lease Management Dept. established |
| 1987 | Opening of Mejiro Branch |
| 1988 | Opening of Jiyugaoka Branch |
| 1994 | Opening of Yokohama Branch Commercial Property Management Dept. established |
| 1996 | Capital increased to ¥200million yen |
| 1997 | Acquisition of the headquarter in Nishi-Azabu |
| 1998 | R.A Asset Management established Ken Real Estate Investment Advisors Ltd. established |
| 2001 | Shibuya Television Co., Ltd. operation started Premier REIT Advisors Co., Ltd. established |
| 2002 | Premier Investment Company was listed on Tokyo Stock Exchange REIT market Sugar Music Entertainment Ltd. established |
| 2003 | Capital increased ¥380million yen Ken Facility Solution Ltd. establisherd |
| 2004 | Ken Media, Inc. operation started Opening of Ginza Branch |
| 2007 | KN Ltd.Property operation started |
| 2008 | Opening of Shibuya Branch Office |