Why do JLPT N5 learners confuse 昨夜 with 今晩?

Both words occupy adjacent semantic territory, which is exactly why the JLPT uses them as distractors for each other on multiple-choice items. The fastest way to stop confusing them is to study them as a pair, write a one-sentence contrast in your own words, and drill the pair specifically rather than each word in isolation.

Is 昨夜 or 今晩 more common on JLPT N5?

Both appear in the JLPT N5 curriculum and either may show up on a given exam. Don't try to predict which one the test will choose — learn to distinguish them and you'll be safe regardless. Both belong to the Daily Life Nouns theme of N5 vocabulary.

How do I practice this confusion pair?

Free option: visit /try and pick a confusion drill. Paid option: none — JLPT Mastery is free during launch. Whichever route you take, the engine specifically re-tests pairs you've gotten wrong rather than rotating through general vocabulary review.

JLPT N5 · Beginner · Meaning confusion

昨夜 vs 今晩

Q: What's the difference between 昨夜 and 今晩?

昨夜 (ゆうべ) means "last night" and 今晩 (こんばん) means "tonight; this evening". Both refer to the evening hours. 昨夜 refers to 'last night' (past), while 今晩 refers to 'this evening' or 'tonight' (present/future), making their timeframes easy to swap.

Why JLPT N5 learners mix up 昨夜 (ゆうべ, “last night”) and 今晩 (こんばん, “tonight; this evening”).

昨夜

ゆうべ

last night

noun

今晩

こんばん

tonight; this evening

noun

Theme: Daily Life NounsJLPT N5

Why these get confused

Both refer to the evening hours. 昨夜 refers to 'last night' (past), while 今晩 refers to 'this evening' or 'tonight' (present/future), making their timeframes easy to swap.

How to tell them apart

Anchor on the meaning, not the form. 昨夜 (last night) and 今晩 (tonight; this evening) live in adjacent semantic territory. Memorize the boundary, not just each word.
Read the example sentences below. Seeing each word in its natural context builds a faster lookup than studying the dictionary form alone.

In a sentence

昨夜 (last night)

昨夜はよく眠れましたか。
昨夜雨が降りました。

今晩 (tonight; this evening)

今晩は何をしますか。
今晩映画を見ましょう。

How JLPT tests this pair

On JLPT N5, this pair shows up as a vocabulary meaning question. You see one word and pick its English equivalent from four options — one of which will be the other word in this pair, chosen as a distractor precisely because of the overlap.

Sample item

「昨夜」の意味は？