Class A river
| system
| Class A rivers | |
| gen. | 一級河川 |
| class A river | |
| gen. | 一級河川 |
| System | |
| comp., MS | システム |
| system | |
| gen. | 機関; 筋道; 筋目; 形式; 系; 系統 |
| comp., MS | システム |
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| 一級河川 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
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| 一級河川 | |||
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| —級河川 (いっきゅう・かせん) | |||
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Class A river : 1 phrase in 1 subject |
| General | 1 |