重大
じゅうだい
juudai
JLPT N3adjectiveVocabularyLevel 27 - JLPT N3
Quick answer
重大 (じゅうだい (juudai)) means "Serious". It is a Japanese adjective. Pronunciation, examples, and related kanji are on this page.
Meaning
Serious
Also : grave · weighty · important · significant
Learn 重大 with SRS
Free to start — no credit card. Track every review with spaced repetition.
Example Sentences
これは重大な問題として対処しなければならない。
これはじゅうだいなもんだいとしてたいしょしなければならない。
This must be dealt with as a serious problem.
重大な決断を下す前によく考えた。
じゅうだいなけつだんをくだすまえによくかんがえた。
I thought carefully before making a serious decision.
Kanji in this word
Grammar to study at this level
- [Verb dictionary/nai form] + ように～ように (you ni) - So that
- [Verb dictionary form] + ことにする～ことにする (koto ni suru) - Decide to
- [Verb dictionary form] + ことになる～ことになる (koto ni naru) - It has been decided that
- [Noun/Verb te-form] + ばかり～ばかり (bakari) - Only / Nothing but
- [Verb/Adjective plain form] + はずだ～はずだ (hazu da) - Should be / It is expected
Last updated Jun 18, 2026
Learn 重大 with Spaced Repetition
InitialJ uses scientifically proven SRS to help you memorize kanji and vocabulary for the JLPT. N5 is free forever; no credit card required.