Earlier this summer, Walker Books released two illustrated books in a new “Moshi Moshi Kawaii” series, in which you search for the bunny-pill characters, kind of like the Where’s Waldo? books. However, these characters aren’t new; they are originally from Japanese company Mindwave and were released in 2002 as “Usa Colle.” The company sold a limited selection of Usa Colle stationery goods and toys at the time, though they’re pretty hard to find these days.

The old site at UsaColle.com is a bit dated now and is mostly in Japanese, but it has some neat things to check out. There are images of all the original characters, short Flash animations to watch, pretty desktop wallpapers and printables to download, and even a cute little game to play.

The book is scheduled to come out on June 2, so you can pre-order the book on Amazon, or check out the official book site for more information. The authors also have their own bento-themed blogs; Crystal Watanabe posts at Adventures in Bentomaking and Makiko Ogawa is at Cute Obento.

The same author also has a book about strange theme restaurants in Tokyo that looks interesting, called Crazy, Wacky Theme Restaurants: Tokyo.