く
| 九 | く | nine | 739 |
| 句 | く | sentence | 1929 1176 |
| 食う | くう | (male) (vulg) to eat | 2116 776 |
| 偶然 | ぐうぜん | (by) chance, unexpectedly, suddenly | 2334 |
| 臭い | くさい | odour, scent, smell, stench | 2335 |
| 鎖 | くさり | chain | 2336 |
| 腐る | くさる | to rot, to go bad | 2337 |
| 癖 | くせ | a habit (often a bad habit), peculiarity | 2338 |
| 管 | くだ | pipe, tube | 1099 |
| 具合 | ぐあい | state, condition | 2020 789 |
| 具体 | ぐたい | concrete, tangible, material | 2020 789 |
| 下さる | くださる | (hon) to give, to confer | 744 |
| 下り | くだり | down-train (going away from Tokyo) | |
| 苦痛 | くつう | pain, agony | 1976 921 |
| 苦労 | くろう | troubles, hardships | |
| ぐっすり | sound asleep, fast asleep | ||
| 区別 | くべつ | distinction, differentiation, classification | 2069 796 |
| 組 | くみ | class, group, team, set | 696-2 |
| 組合 | くみあい | association, union | |
| 組む | くむ | to put together | |
| 曇 | くもり | cloudiness, cloudy weather, shadow | 2339 |
| 位 | くらい | grade, rank, about | 969 |
| 暮らし | くらし | living, livelihood, subsistence, circumstances | 1409 |
| 暮らす | くらす | to live, to get along | |
| 暮れ | くれ | year end, sunset, nightfall, end | |
| 暮れる | くれる | to get dark | |
| クラシック | classic(s) | ||
| グラス | (1) glass, (2) grass | ||
| グランド | gland, grand, (electrical) ground | ||
| クリーム | cream | ||
| 繰り返す | くりかえす | to repeat, to do something over again | 2340 |
| クリスマス | Christmas | ||
| 狂う | くるう | to go mad, to get out of order | 2341 |
| グループ | group | ||
| 苦しい | くるしい | painful, difficult | 1976 921 |
| 苦しむ | くるしむ | to suffer, to groan, to be worried | 1976 921 |
| 加える | くわえる | to append, to sum up, to add (up) | 615 |
| 加わる | くわわる | to join in, to accede to, to increase, to gain in (influence) | |
| 詳しい | くわしい | knowing very well, detailed, full, accurate | 2342 |
| 訓 | くん | native Japanese reading of a Chinese character | 1122 |
| 訓練 | くんれん | practice, training | |
| 軍 | ぐん | army, force, troops | 1132 |
| 軍隊 | ぐんたい | army, troops |