Shikoku Kōsoku Bus Co., Ltd. (四国高速バス株式会社, Shikoku Kōsoku Basu Kabushiki-gaisha) is a bus company in Kagawa Prefecture, Japan. The company operates only expressway route buses.
Fukuoka Line (Sanuki Express Fukuoka, Takamatsu, Marugame~Fukuoka); servicing it in collaboration with Nishitetsu Kosoku Bus (a group of Nishi-Nippon Railroad)
Kyoto Line (Takamatsu Express Kyoto, Takamatsu~Kyoto); servicing it in collaboration with Keihan Bus (a company of Keihan Electric Railway group), JR Shikoku Bus and Nishinihon JR Bus
Osaka Line (Sanuki Express Osaka, Takamatsu~Namba, Osaka); servicing it in collaboration with Hankyu Bus (a company of Hankyu Hanshin Holdings), JR Shikoku Bus and Nishinihon JR Bus
Kansai Airport Line (Kansai Airport Limousine Bus, Takamatsu~Kansai Int'l Airport); servicing it in collaboration with JR Shikoku Bus, Nankai Bus (a company of Nankai Electric Railway group) and Kansai Airport Limousine.
Kobe Line (Sanuki Express Kobe, Takamatsu~Sannomiya, Shin-Kobe, Universal Studios Japan); servicing it in collaboration with Shinki Bus, JR Shikoku Bus and Nishinihon JR Bus
Yawatahama Line (Sanuki Express Yawatahama, Takamatsu~Uchiko, Ozu, Yawatahama); servicing it in collaboration with Iyotetsu Nan-yo Bus - defunct on March 31, 2010