| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Ima nōshi o dō kangaeru ka | 978-4-06-205199-6 (4-06-205199-0) | 1991 |
| Kaze no yō ni haha no tayori | 978-4-06-206567-2 (4-06-206567-3) | 1993 |
| Watanabe Junʼichi miraigaku taidan | 978-4-06-200873-0 (4-06-200873-4) | 1984 |