Leijac Co., Ltd. ( レジャック株式会社 ) was a Japanese games publisher mainly for Konamin in the late '70s. By the beginning of 1982 they have ceased to publish games and Konami took charge of their whole game making process and publish the games themselves.

By July 14th 1986 the company merged with Marcy co., Ltd. (株式会社マーシー) who in turn filed for bankruptcy and liquidation by April 15th 2002.