An overview on the current status of Japanese fusion nuclear technology (FNT) effort is presented including: the scheme and role of organizations, R&D schedule and design goals for Fusion Experimental Reactor and its succeeding facilities, categories and missions of FNTs, R&D activity topics, available equipments, international cooperation programs etc. Also, the framework of the plan to enhance fundamental research on FNT is reviewed, in view of the growing necessity of closer cooperation among all sectors.