| title | ISBN-13 | year of publication |
|---|---|---|
| Chisana shuyoron: Chichi no kotoba. | 978-4-8009-1007-3 | 2013 |
| Life theory note small WEB version ISBN: 4884748247 | 978-4-88474-824-1 | 2008 |
| (Small life theory series) small life theory ISBN: 4884746600 | 978-4-88474-660-5 | 2003 |
| - that sent The two to a life dedicated aphorism leading our ISBN: 4884749529 | 978-4-88474-952-1 | 2012 |