Ken formed company · 日経BP (nikkeiBP)
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| はじめてのSun Java Studio Creator hajimetenoSun Java Studio Creator | 978-4-8222-2128-7 (4-8222-2128-8) | 2004 |
| ミミズのダンスが大地を潤す (のぎへんのほん) mimizunodansugadaichi/ | 978-4-87639-043-4 (4-87639-043-6) | 1995 |