| にほんご | jpn-002 |
| けんきゅう | |
| Deutsch | deu-000 | Erforschung |
| Deutsch | deu-000 | Forschung |
| Deutsch | deu-000 | Studium |
| English | eng-000 | Kenkyu |
| English | eng-000 | research |
| English | eng-000 | study |
| English | eng-000 | thorough investigation |
| 日本語 | jpn-000 | 建久 |
| 日本語 | jpn-000 | 研究 |
| Nihongo | jpn-001 | kenkiyuu |
| нихонго | jpn-153 | кэнкю: |
| русский | rus-000 | изучение |
| русский | rus-000 | исследование |