| タイトル | 発売元 | 最高位 | 登場 週数 |
売上数 （万枚） |
発売日 |
| un-balanced | SR | 57 | 3 | 1.8 | 95.7.7 |
| THE CHANGING SAME | SR | 1 | 18 | 91.3 | 00.6.21 |
| THE CHANGING SAME | DEF | 14 | 44 | 35.2 | 00.10.1 |
| gaining through losing | DEF | 2 | 27 | 108.1 | 01.7.4 |
| Kh re-mixed up 1 | DEF | 6 | 8 | 18.6 | 01.11.28 |
| LIFE is... | DEF | 1 | 94 | 81.0 | 03.1.22 |
| Ken's Bar | DEF | 2 | 63 | 49.2 | 03.12.10 |
| SENTIMENTALovers | DEF | 1 | 52 | 166.1 | 04.11.24 |
| Ken Hirai 10th Anniversary Complete Single Collection '95-'05 “歌バカ” |
DEF | 1 | 89 | 210.7 | 05.11.23 |
| FAKIN' POP | DEF | 2 | 19 | 33.2 | 08.3.12 |
| Ken's BarⅡ | DEF | 2 | 13 | 12.2 | 09.5.27 |
| Ken Hirai 15th Anniversary c/w Collection '95-'10 “裏 歌バカ” |
DEF | 5 | 10 | 4.4 | 10.11.10 |
| JAPANESE SINGER | DEF | 3 | 32 | 14.1 | 11.6.8 |