Mizuumi boys and girls choir

- Ookinakurino Kinoshitade
- Yoiko No Douyou · 2005
- Doremi No Uta
- Yoiko No Doyo Best From Hihirecords · 2005
- Sakura Sakura
- Yoiko No Douyou · 2005
- Ikeike bokura no GUNBUSTER!! (with Mizuumi boys and girls choir)
- Aim for the Top GunBuster Original Soundtrack · 2012
- Itazu Rakko
- Kodomo To Kikitai Doyo -Genki Na Dobutsu No Uta- From Hihirecords · 2005
- Otsukaiarisan
- Yoiko No Douyou · 2005
- Ikeike bokura no GUNBUSTER!!(TV size) (with Mizuumi boys and girls choir)
- Aim for the Top GunBuster Original Soundtrack · 2012
- Neko Funjatta
- Kodomo To Kikitai Doyo -Genki Na Dobutsu No Uta- From Hihirecords · 2005
- Aiai
- Yoiko No Doyo Best From Hihirecords · 2005
- Yuki
- Yoiko No Douyou · 2005
- Akatonbo
- Yoiko No Douyou · 2014
- Koganemushi
- Sato Mama no Roku Sai Made ni Oboetai Doyo Syoka 120 -Utainagara Manabu Nihon no Kokoro Vol.2 · 2022
- I Saw Mummy Kissing Santa Claus
- Happy Kids X'mas! Japanese Christmas Songs · 2019

Kohei Oikawa no Kodomo no Uta "Umi ya Yama no Kamisama Tachi" -Kokodemo Imademo Nai Hanashi

Kohei Oikawa no Kodomo no Uta "Umi ya Yama no Kamisama Tachi" -Kokodemo Imademo Nai Hanashi

2007

Top Songs