| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Harukanaru kokoro no tabi | 978-4-06-203967-3 (4-06-203967-2) | 1989 | Kuniko Ōishi |
| Watakushi no naka no ai to shi | 978-4-06-202007-7 (4-06-202007-6) | ||
Kanju Ohsawa · Kenichi Ogawa · Kenichi Ohashi · Kenichi Oishi · Kenji Ogawa · Kenji Oikawa · Kingo Ochiai · Kunihiko Ogawa