- Oyasuminasai (おやすみなさい)
- Catalog Number
- Oyasuminasai (おやすみなさい; Good Night)
- Hi to Kage (陽と陰; Sun and Shadow)
- Cocoa (ココア)
- Oyasuminasai (instrumental)
"Oyasuminasai" is aiko's ninth single. The title song was used as the theme song for the dorama Sayonara, Ozu Sensei. The single reached #2 on the weekly Oricon charts and charted for nine weeks. It sold 161,690 copies, becoming the #77 single of 2002.