未熟 (mijuku) conjugation
inexperience, unskilled, immature
未熟 (みじゅく, mijuku) is a na-adjective. Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
Conjugation table
| Form | Plain (casual) | Polite (~です) | When you use it |
|---|---|---|---|
| Dictionary / plain | 未熟だ mijukuda | 未熟です mijukudesu | The form you look up. Also the casual “is ~”. |
| Negative | 未熟じゃない mijukujanai | 未熟じゃないです mijukujanaidesu | “is not ~”. |
| Past | 未熟だった mijukudatta | 未熟でした mijukudeshita | “was ~”. |
| Past negative | 未熟じゃなかった mijukujanakatta | 未熟じゃなかったです mijukujanakattadesu | “was not ~”. |
| Te-form | 未熟で mijukude | — | Links to the next clause: “~ and …”. |
| Adverb | 未熟に mijukuni | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 未熟な〜 mijukuna〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 未熟なら mijukunara | — | “if it is ~”. |
| Conditional (~たら) | 未熟だったら mijukudattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 未熟になる mijukuninaru | 未熟になります mijukuninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 未熟すぎる mijukusugiru | 未熟すぎます mijukusugimasu | “too ~”. |
| Looks ~ (~そう) | 未熟そう mijukusou | 未熟そうです mijukusoudesu | “looks / seems ~” from appearance. |
🔊 Tap any Japanese word to hear it spoken.
Why it conjugates this way
Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
See the full rules in the adjective conjugation guide.