Oshogatsu

 is the thirtieth album released by Seifuku Koujo Iinkai, and their final album under that name until 2011, when the group was rebooted. It was released three months after the group originally disbanded.

Tracklist

 * 1) Katsu! (カッ！)
 * 2) Ai Dake ja Happy...? (愛だけじゃハッピー…？; Love is not enough to make you happy...?)
 * 3) Yasai Kudasai (野菜ください; Vegetables please)
 * 4) Ikiru Tame Ni (生きるために; To Live)
 * 5) Mukatsu (ムカッ; Piss off!)
 * 6) Asa to Yoru (朝と夜; Day and Night)
 * 7) Tsukame-sou de Tsukamenai Mono (つかめそうで　つかめないもの; What you can't seem to grasp)
 * 8) Kokoro no Freeway (心のフリーウェイ; The heart's freeway)
 * 9) RAINYDAY⇔SUNYDAY (Ame Nochi Hare) (RAINYDAY⇔SUNYDAY（雨のち晴れ）)
 * 10) Yasashiku Shite Agete (優しくしてあげて; Be gentle with them)
 * 11) Ai Dake ja Happy...?
 * 12) What a Wonderful World

Featured Members

 * Hashimoto Mika (#7 #8 #9 #10 #12)
 * Hoshikawa Ririka (#5 #12)
 * Katahira Hinako (#1 #3 #4 #10 #12)
 * Mitsuo Mafuyu (#2 #4 #9 #10 #11 #12)