The purpose of this study was to suggest the direction of Korean baseball, which has lost international competitiveness, through a comparative review with Japanese baseball. Through analysis of related researches such as Japan's Bukatsu, Koshien, and posting system, the background and current status of Japanese baseball were focused, and problems and improvement plans for Korean baseball were derived. First, the weekend league system was implemented, due to the absence of a social sports education environment, but problems were found. Second, the use of wooden bats' effect was found to be minimal for securing international competitiveness. Third, most of the domestic players' overseas advancement through the posting system was after their prime, and they failed and returned to the domestic league soon. As for improvement plans, first, it is necessary to reconsider whether the current student sports system is suitable for the Korean sports environment. Second, for the resurgence of high school baseball, changes to metal bats and holding national competitions linked to local and professional teams should be considered. Third, efforts should be made to generalize the formula of playing in domestic leagues and then advancing to overseas leagues by revising the posting system.