Saikou Kessaku

 is the fifth major single (sixth overall) by MELLOW MELLOW.

Regular Edition CD

 * 1) Saikou Kessaku (最高傑作)
 * 2) Main Street wa Asa 7ji (メインストリートは朝7時)
 * 3) Saikou Kessaku (Instrumental)
 * 4) Main Street wa Asa 7ji (Instrumental)

Limited Edition CD

 * 1) Saikou Kessaku (最高傑作)
 * 2) Main Street wa Asa 7ji (メインストリートは朝7時)

Limited Edition DVD

 * 1) Saikou Kessaku (Music Video) (Type A Only)
 * 2) Saikou Kessaku (Music Video Making) - Part 1 (Type A Only)
 * 3) Saikou Kessaku (Music Video Making) - Part 2 (Type B Only)