SDN48's 1st Generation (SDN48 1期生). They were originally announced on July 2009, followed their transferred members from AKB48 and SKE48 on August 23, 2009 until December 1, 2009. They were disbanded on March 31, 2012, along with 2nd Generation and 3rd Generation.
Graduated Members
- Iwata Yuki (ゆうき Yuuki, がんちゃん Ganchan) (2009)
- Nakazato Ayami (あやみん Ayamin) (2009)
- Ito Kana (かなにゃん Kananyan) (2011)
- Akita Kazue (かず Kazu) (2012)
- Imayoshi Megumi (メグ Megu) (2012)
- Umeda Haruka (うめこ Umeko) (2012)
- Urano Kazumi (CinDy) (2012)
- Okouchi Misa (みさみさ Misamisa) (2012)
- Ohori Megumi (めーたん Meetan) (2012)
- Kaida Juri (じゅり Juri) (2012)
- Kato Mami (まみたん Mamitan) (2012)
- Kouchi Masami (まさみん Masamin) (2012)
- Kohara Haruka (きゅるるん〜 Kyururun~) (2012)
- Kondo Sayaka (さやねぇ Sayanee) (2012)
- Sato Yukari (ゆかりん Yukarin) (2012)
- Serina (せりんこ Serinko) (2012)
- Chen Qu (ちゅちゅー Chuchuu) (2012)
- Tezuka Machiko (まっちぃ Macchi) (2012)
- Nachu (なちゅはむ Nachuhamu) (2012)
- Nishikunihara Reiko (レイチェル Rachel/Reicheru) (2012)
- Noro Kayo (ノンティー Nontii) (2012)
- Hatakeyama Chisaki (ちゃき Chaki) (2012)
- Mitsui Hiromi (ひろみん Hiromin) (2012)
Stages
| # | Stage name | Date | Performances |
| 1 | Yuuwaku no Garter (誘惑のガーター) |
2009.08.01 - 2012.03.28 | 338 |