is the second album released by Japanese pop punk band Shonen Knife and is almost exclusively in Japanese.

The album was named after Atsuko, their drummer, the honorific "-chan" being added.

[2] The title thus functions as a pun, since the drummer's name, when rendered in the traditional Japanese style, is Yamano Atsuko.

The original Japanese 8" vinyl (Zero Records 0-0584) includes 10 songs.

The CD reissue bonus tracks are either "Flying Jelly Attack" and "Insect Collector" live (Oglio Records, USA), or "Secret Dance" and "Flying Saucer Attack" (MCA Victor, Japan).