Heyawake is a binary-determination logic puzzle published by what Japanese publisher that specializes in games, and especially, logic puzzles?
Nikoli (publisher) Nikoli Co., Ltd. (Japanese: 株式会社ニコリ , Hepburn: Kabushiki-gaisha , Nikori) is a Japanese publisher that specializes in games and, especially, logic puzzles. "Nikoli" is also the nickname of a quarterly magazine (whose full name is "Puzzle Communication Nikoli") issued by the company in Tokyo. "Nikoli" was established in 1980 and became prominent worldwide with the popularity of "Sudoku".
Pack-In-Video Pack-In-Video (パック・イン・ビデオ , also Pack-In-Soft) was a Japanese video game publisher and developer. The games published were mostly focused on the Japanese market although a few titles have been published abroad. In October 1996 the company was merged with the video game division of Victor Entertainment and became Victor Interactive Software.