Koi wa Question

 is the sixth single released by Onyanko Club.

It was released on November 1, 1986.

On March 21, 2018, the cassette was re-released to be exclusively featured in crane games located in specific HMV music stores.

Single Information
It was used as the opening and ending themes for the anime Anmitsu Hime.
 * Catalog Number:
 * 7A0646 (Vinyl)
 * 10P3025 (Cassette)
 * BRTA-00006 (Crane Game Cassette)
 * 7AH-00646 (CD)
 * Lyrics: Akimoto Yasushi (秋元康)
 * Composition:
 * Mitake Akira (見岳章) (Track 1)
 * Nagasawa Hiro (長沢ヒロ) (Track 2)
 * Arrangement:
 * Mitake Akira (Track 1)
 * Yamakawa Etsuko (山川恵津子) (Track 2)

Vinyl / Crane Game Cassette

 * 1) Koi wa Question (恋はくえすちょん; The Question of Love)
 * 2) Anmitsu Daisakusen (あんみつ大作戦; Anmitsu's Big Battle)

Cassette

 * 1) Koi wa Question
 * 2) Anmitsu Daisakusen
 * 3) Koi wa Question (Instrumental)
 * 4) Anmitsu Daisakusen (Instrumental)

Featured Members

 * 6 Kihara Aki
 * 8 Kokusho Sayuri
 * 13 Utsumi Kazuko
 * 14 Tomikawa Harumi
 * 15 Tatsumi Rika
 * 16 Takai Mamiko
 * 17 Jounouchi Sanae
 * 18 Nagata Ruriko (Main Vocal)
 * 19 Iwai Yukiko (Main Vocal)
 * 22 Shiraishi Mako (Main Vocal)
 * 28 Yokota Mutsumi
 * 29 Watanabe Minayo
 * 33 Fukawa Tomoko
 * 36 Watanabe Marina
 * 38 Kudo Shizuka
 * 40 Ikuina Akiko (Main Vocal)

Covers

 * Momoi Haruko - Momoi Haruko COVER BEST -Cover Densha- (Track 7)