TETSUJIN Inc. is mainly engaged in the karaoke room operation business. The Karaoke Room Operation segment operates 56 karaoke stores under the name Karaoke Tetsujin, as well as one karaoke store without Tetsujin system. The Full-service Cafe segment operates nine cafes under the name Karafuneya. The Contents Provider segment is engaged in the development, creation, sale and delivery of ring tone contents for mobile phones. The Others segment is engaged in the billiard and dart recreation hall operation business with two recreation halls providing billiard and dart facilities under the name Sanbiri; the manga (Japanese comic books) cafe operation business with six stores providing comics, magazines and Internet services, and the concept cafe business.