Since 1996, it appeared three kinds of phenomena existed between Taiwan and Japan. Official visits were frequent but mainly for Congressmen. Business corporations were increased but limited only to deal with Chinese market. And popular exchange visits were intensive but confined only in tourism issues. Why the economic interflow could not escalate it to more political level between Japan and Taiwan? This paper presented argument primarily based on the influence of interests to Japan. The fundamental benefits of nation and business attract Japan toward Taiwan in the triangle relationships among Japan-China-Taiwan. However, the diplomatic benefit and the rise of Neo-conservatism pull it backward to the balance point.