| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | auxiliary verb | Japanese-speaking countries | Used infrequently and often omitted when the context makes the meaning clear | 1 |
| 2 | verb | Japanese culture | Verbs are conjugated according to various levels of politeness and formality in Japanese language. | 1 |
| 3 | verb | Japanese-speaking countries | Often placed at the end of a sentence, and often omitted if the subject is clear from context | 1 |