| June | |
| 21 | LIVE DVD "ASIALIVE 2005" release |
| August | |
| 30 | First 15 singles re-release "Blurry Eyes" "Vivid Colors" "NatsuNatsu no Yu-utsu [time to say good-bye]" "Kaze ni kienaide" "flower" "Lies and Truth" "the Fourth Avenue Cafe" "niji" "winter fall" "DIVE TO BLUE" "HONEY" "Kasou" "Shinshoku-lose control-" "snow drop" "forbidden lover" *All enter, simultaneously, the Top 30 singles chart, which is yet another unprecedented record |
| September | |
| 01 | The official fan club is established in China |
| November | |
| 25 | "15th L'Anniversary Live" (Tokyo Dome) |
| 26 | "15th L'Anniversary Live" (Tokyo Dome) (109,652 people) |
| Nov - Dec | “Hitomi no Juunin” Commercial song for Glico in China |
| December | |
| 13 | Album "ark 15th Anniversary Expanded Edition" "ray 15th Anniversary Expanded Edition" dual release |
