2006 was the year in which Mitsui Aika joined Morning Musume and Konno Asami and Ogawa Makoto graduated from Morning Musume
Singles
- March 15: SEXY BOY ~Soyokaze ni Yorisotte~ - Morning Musume
2006 was the year in which Mitsui Aika joined Morning Musume and Konno Asami and Ogawa Makoto graduated from Morning Musume