Manatsu no Kōsen

"Manatsu no Kōsen" (真夏の光線) is the fifth single of the J-pop idol group Morning Musume, released on May 12, 1999 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. It was first single without Asuka Fukuda.

8 cm CD

 * 1) Manatsu no Kōsen (真夏の光線) – 5:07
 * 2) Koi no Shihatsu Ressha (恋の始発列車) – 4:20
 * 3) Manatsu no Kōsen (Instrumental) (真夏の光線 (Instrumental)) – 5:06

12 cm CD (Early Single Box and individual release)

 * 1) Manatsu no Kōsen (真夏の光線) – 5:09
 * 2) Koi no Shihatsu Ressha (恋の始発列車) – 4:22
 * 3) Manatsu no Kōsen (Instrumental) (真夏の光線 (Instrumental)) – 5:11
 * 4) Manatsu no Kōsen (Early Version) (真夏の光線 (Early Version)) – 5:00

Members at time of single

 * 1st generation: Yuko Nakazawa, Aya Ishiguro, Kaori Iida, Natsumi Abe
 * 2nd generation: Kei Yasuda, Mari Yaguchi, Sayaka Ichii