Heyawake is a binary-determination logic puzzle published by what Japanese publisher that specializes in games, and especially, logic puzzles?
Nikoli Co., Ltd.
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).
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".
Light Up (puzzle)
Light Up (Japanese:美術館 "bijutsukan", art gallery), also called Akari, is a binary-determination logic puzzle published by Nikoli.
 As of 2011, three books consisting entirely of "Light Up" puzzles have been published by Nikoli. Bag (puzzle)
Bag (also called Corral or Cave) is a binary-determination logic puzzle published by Nikoli. Shikaku
Shikaku (四角に切れ , shikaku ni kire ) (also anglicised as "Divide by Squares" or "Divide by Box") is a logic puzzle published by Nikoli.
 As of 2011, two books consisting entirely of Shikaku puzzles has been published by Nikoli. Puzzle
A puzzle is a game, problem, or toy that tests a person's ingenuity or knowledge.
 In a puzzle, the solver is expected to put pieces together in a logical way, in order to arrive at the correct solution of the puzzle.
 There are different genres of puzzles, such as crossword puzzles, word-search puzzles, number puzzles, or logic puzzles. Hotaru Beam
Hotaru Beam is a binary-determination logic puzzle published by Nikoli. Gokigen Naname
Gokigen Naname is a binary-determination logic puzzle published by Nikoli. Ripple Effect (puzzle)
Ripple Effect (Japanese:波及効果 "Hakyuu Kouka") is a logic puzzle published by Nikoli.
 As of 2007, two books consisting entirely of "Ripple Effect" puzzles have been published by Nikoli.
 The second was published on October 4, 2007. Kuromasu
Kuromasu (Japanese:黒どこ "kurodoko") is a binary-determination logic puzzle published by Nikoli.
 As of 2005, one book consisting entirely of Kuromasu puzzles has been published by Nikoli.