みかん by モーニング娘。

"Mikan" (みかん, "Mandarin Orange") is the thirty-fifth single of Japanese female idol group Morning Musume. The song's title was chosen in accordance to the habit of eating mandarin oranges while sitting by a kotatsu, as a representation of each member's childhood memories. Mikan's Promotional video extends this concept further, by showing photographs of the members when they were children. It was released on November 21, 2007.Like its predecessor, there are three editions. Limited edition A is accompanied by a bonus DVD, while a 40-page booklet is available in limited edition B enclosed in a special package. The catalog numbers of each limited edition copies are EPCE-5514 and EPCE-5515, respectively. The regular edition has a catalog number EPCE-5517. The limited and first press of the regular comes with one of ten photo cards, there is one for each member and one for the group.