Manatsu no Kousen

" is the fifth single of the J-pop idol group Morning Musume, released on  as an 8 cm CD. It sold a total of 235,010 copies, and reached number three on the Oricon Charts. In 2004, It was re-released as part of the Early Single Box and again in 2005, as a 12 cm CD. The lead vocalist of this single was Natsumi Abe.

Track listing
8 cm CD
 * 1) Manatsu no Kōsen – 5:07
 * 2) Koi no Shihatsu Ressha – 4:20
 * 3) Manatsu no Kōsen (Instrumental) – 5:06


 * 1) Manatsu no Kōsen – 5:09
 * 2) Koi no Shihatsu Ressha – 4:22
 * 3) Manatsu no Kōsen (Instrumental) – 5:11
 * 4) Manatsu no Kōsen (Early Version) – 5:00

Member at time of single

 * Natsumi Abe
 * Kaori Iida
 * Yuko Nakazawa
 * Aya Ishiguro
 * Mari Yaguchi
 * Kei Yasuda
 * Sayaka Ichii