| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| OD> Heian era history encyclopedia on this title ISBN: 404622701X | 978-4-04-622701-0 (4-04-622701-X) | |
| (The - was) OD> Heian era history encyclopedia under this title ISBN: 4046227028 | 978-4-04-622702-7 (4-04-622702-8) |