Tadao has written many books in the international practical business field. For example, Yushutsunyu-Gaikokukawase-Jitsumujiten(Nihon-Jitsugyo-Shuppansha)
Eibun-Meisaku-Choyaku-1,-2,-3(Sanshusha-Shuppan) are still popular in Japan. He at present is creating one of small-publishing-peoples-group named ‘Around-Yatsugatake-Highlanders-Sekai-Shuppan’…