- Seijun Philosophy (清純フィロソフィー)
- Akimoto Yasushi
- Tada Shinya
- Other Information
- Arrangement: Ikuta Machine
Artist: Team 4
- (Center: Kojima Mako)
- Team 4: Aigasa Moe, Iwatate Saho, Uchiyama Natsuki, Umeta Ayano, Okada Ayaka, Okada Nana, Kitazawa Saki, Kojima Mako, Shinozaki Ayana, Takashima Yurina, Nishino Miki, Hashimoto Hikari, Maeda Mitsuki, Minegishi Minami, Murayama Yuiri, Mogi Shinobu
There are currently two versions of "Seijun Philosophy" to be found in AKB48's discography. These versions are:
- Seijun Philosophy (Original)
- Found on the Type-4 edition of the "Heart Ereki" single as track #3.
- Seijun Philosophy (off vocal ver.)
- Found on the Type-4 edition of the "Heart Ereki" single as track #6. This is the standard version without the main vocals.
- STUDIO48: "Seijun Philosophy" lyrics