| Subject | English | Japanese |
| gen. | n lesson learned from someone's else mistake | 他山の石 news2 nf38 |
| gen. | n Lesson one | 第一課 |
| gen. | n vs lesson or a phrase that teaches you not to do something | 訓誡 |
| gen. | n vs lesson or a phrase that teaches you not to do something | 訓戒 news2 nf46 spec2 |
| gen. | n lesson or teaching plan | 教案 |
| gen. | n vs lesson study | 下読 io |
| gen. | n vs lesson study | 下読み |
| gen. | take a lesson from | 爪の垢を煎じて飲む (a wise person) |