| |||
| 一級河川 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
| |||
| 一級河川 | |||
| |||
| —級河川 (いっきゅう・かせん) | |||
|
Class A river : 1 phrase in 1 subject |
| General | 1 |
| |||
| 一級河川 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
| |||
| 一級河川 | |||
| |||
| —級河川 (いっきゅう・かせん) | |||
|
Class A river : 1 phrase in 1 subject |
| General | 1 |