Nippon Idol tantei-dan 4 (Nippon Idol Detectives 4) (1989)

NIPPON アイドル探偵団 4

Featuring Shizuka Ochi, Yukie Okazaki, Yoko Yakushiji, Megumi Odaka and Miho Hayashi.
Also features a weird low-budget drama episode with bad acting.

Drama cast:
Seiko Kanzaki (神崎聖子), Michie Watanabe (渡辺路恵), Madoka Kitahara (北原まどか), Terumi Morita (森田輝美), Mai Imano (今野舞), Megumi Munekata (宗形恵), Yuuko Nakamoto (中本優子), Yuka Tomura (戸村由香)