Hitomi no Saki ni (2009)
- This single comes with a Limited Edition w/ DVD version, or the regular CD Only version. In this case, the versions have the same covers.
- In this single's credits, Yamato lists himself as "Yamamoto Peanut Bread Sparrow"; Naoto lists himself as "programming, other instruments, g."
- "Hitomi no Saki ni" was used as the opening theme to the NHK TV drama Twin Spica.
- "Hitomi no Saki ni" was actually completed two years prior to being released. It was debuted at the fan club tour "AID JAM 009".
- Regarding "Hitomi no Saki ni", Naoto said "I thought to myself that we should do something like this before we truly became adults, so why not?" The song also ties back to "Kimi Station".
- The song "Hitomi no Saki ni" is a ballad. The PV was filmed at a location in Okinawa and Yamauchi Park. Okinawan youths were featured in the song, including Kensuke Owada of the Owada Family.
- "crystal" is an instrumental piece composed by Yoh.
- "Oshare Banchou ~80kidz Remix~" was the song "Oshare Banchou feat Soy Sauce" remixed by techno group 80kidz.