| Subject | English | Japanese |
| gen. | n Forgive me for dispensing with the preliminaries, but I hasten to inform you that... | 前略 ichi1 opening formula of a brief letter |
| gen. | n Forgive me for dispensing with the preliminaries, but I hasten to inform you that... | 略啓 opening formula of a brief letter |
| gen. | n Forgive me for dispensing with the preliminaries, but I hasten to inform you that... | 冠省 formal salutation for a brief letter |
| slang | inform a superior of someone's actions | チクる |
| slang | inform a superior of someone's actions | ちくる |
| gen. | inform about | 聞かす ichi1 news1 nf04 |
| gen. | n vs inform on | 密告 news2 nf35 |
| gen. | inform on someone | たれ込む |
| gen. | inform on someone | 垂れ込む |