Shiho Iwasaki (岩崎志保 Iwasaki Shiho?) is the center of the group NEXT STORM. She was formerly one of the first-generation members also the center of I-1club after taking the role from Mayu Shimada. She and Mayu competed for the center spot as part of president Shiraki's stipulation and won the spot after defeating Mayu in sales records. Despite her center spot and among the most popular members of the I-1club, she continues to view Mayu as a rival. Her center duties for I-1club have been succeeded by Moka Suzuki. Her nickname is "Shihocchi".
- Wake Up, Girls! Seven Idols
- Wake Up, Girls!
- Wake Up, Girl ZOO!
- Wake Up, Girls! Shadow of Youth
- Wake Up, Girls! Beyond the Bottom
- Wake Up, Girls! New Chapter
- Little Challenger: Wake Up, Girls! I-1 Club Side Story
- Wake Up, Girls! Leaders (non-speaking)
- Wake Up, Girls! Eternal Senses
I-1club Team SEdit
- For more information see Shiho/Image Gallery
|Wake Up, Girls!||Mayu Shimada (Mayu Yoshioka) • Airi Hayashida (Airi Eino) • Minami Katayama (Minami Katayama) • Yoshino Nanase (Yoshino Aoyama) • Nanami Hisami (Nanami Yamashita) • Kaya Kikuma (Kaya Okuno) • Miyu Okamoto (Miyu Takagi)|
|Run Girls, Run!||Hayashi Ayumi (Hayashi Koko) • Morishima Otome (Morishima Yuuka) • Atsugi Itsuka (Atsugi Nanami)|
|I-1club||Moka Suzuki (Nozomi Yamamoto) • Mai Kondo (Emiri Kato) • Megumi Yoshikawa (Minami Tsuda) • Nanoka Aizawa (Kaori Fukuhara) • Rena Suzuki (Satomi Akesaka) • Tina Kobayakawa (Yasuno Kiyono) • Rika Takashina (Reina Ueda)|
|NEXT STORM||Shiho Iwasaki (Ootsubo Yuka) • Aya Mizuta (Chika Anzai) • Noa Morina (Kouno Marika) • Hina Fujisaki (Mao Amatsuka)|
|Green Leaves Entertainment||Kouhei Matsuda • Junko Tange|