In this study, it is analyzed that in Japan 1990's, marketing and popular music have had mutual close relations through Tie-up songs. The term of "Tie-up-song" is defined a popular song which has some tie-up relations or contracts for commercial purposes as a theme song to movies, TV dramas, TV shows, etc., and/or as an adverting song for particular brands, firms, campaigns, etc.. For example, Celine Dion's "The Hearts Will Go On" for "Titanic", Whitney Houston's "I Always Love You" for "The Body Guard". In 1990s, in Japan, most of hit popular songs have held tie-up relations so as to increase their opportunities to public appearance. Some says that without tie-up, there is no hit. In this context, hit making mechanism in Japanese pop scene is analyzed from the aspects of business marketing. Finally, it is emphasized that a discipline of music marketing should be established in order to develop popular music business.