Shobo Kiko · 永岡書店 (nagaokashoten)
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Brain Exercise Workbook = No ga mirumiru wakagaeru sokucho doriru | 978-4-87771-126-9 (4-87771-126-0) | 2004 | Takaki Tanaka |
| Brain Training = No toreningu: no ga gungun wakagaeru | 978-4-522-47570-6 (4-522-47570-5) | 2005 | |
| Drill only listen to train 10 minutes! Brain sleep grounder ISBN: 4877711899 | 978-4-87771-189-4 (4-87771-189-9) | 2006 | |