Team Unknown
AKB48's Team Unknown was a temporary Team created for members that were not promoted to a specific Team. The system was used with 10 members before the Team 4 formation, and later with the 6 members promoted on June 24, 2012, before the Tokyo Dome Team Shuffle.
Transfered
- Nagao Mariya (まりやぎ Mariyagi) (Team 4)
- Nakamura Mariko (こまり Komari) (Team 4)
- Yamauchi Suzuran (らんらん Ranran) (Team 4)
- Shimada Haruka (はるぅ Haruu) (Team 4)
- Takeuchi Miyu (みゆみゆ Miyumiyu) (Team 4)
- Oba Mina (みなるん Minarun) (Team 4)
- Shimazaki Haruka (ぱるる Paruru) (Team 4)
- Mori Anna (なんちゃん Nanchan) (Team 4)
- Nakamata Shiori (しおりん Shiorin) (Team 4)
- Ichikawa Miori (みおりん Miorin) (Team 4)
- Izuta Rina (いずりーな Izuriina) (Team A)
- Morikawa Ayaka (あーや Aaya) (Team A)
- Kobayashi Marina (まりんちゃん Marin-chan) (Team A)
- Fujita Nana (なぁな Naana) (Team K)
- Kojima Natsuki (なっつん Nattsun) (Team B)
- Natori Wakana (わかにゃん Wakanyan) (Team B)
