| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Kofuku no keisanshiki: Kekkon shonendo no kofuku no nedan wa 2500man'en. | 978-4-484-12101-7 (4-484-12101-8) | 2012 | Naoko Abe |
| The Happiness Equation: The Surprising Economics of Our Most Valuable Asset | 978-1-84831-166-4 (1-84831-166-4) | 2010 | |