Heyawake is a binary-determination logic puzzle published by what Japanese publisher that specializes in games, and especially, logic puzzles?
Heyawake Heyawake (Japanese: へやわけ, "divided rooms") is a binary-determination logic puzzle published by Nikoli. As of 2013, five books consisting entirely of "Heyawake" puzzles have been published by Nikoli. It first appeared in "Puzzle Communication Nikoli" #39 (September 1992).
Birthday (company) Birthday Ltd. (バースデイ , Bāsudei ) is a Japanese video game developer and character design firm based in Akasaka, Minato, Tokyo. The company developed the "Kaijū Monogatari" games and designs of the manga and anime series "Fushigiboshi no Futagohime".