Why do JLPT N5 learners confuse 二十日 with 十日?

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 二十日 or 十日 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

二十日 vs 十日

Q: What's the difference between 二十日 and 十日?

二十日 (はつか) means "twenty days; 20th (of month)" and 十日 (とおか) means "ten days; 10th (of month)". Both refer to dates involving the number ten. The irregular reading "hatsuka" (20th) is a unique outlier that learners often mix up with the more predictable "tōka" (10th).

Why JLPT N5 learners mix up 二十日 (はつか, “twenty days; 20th (of month)”) and 十日 (とおか, “ten days; 10th (of month)”).

二十日

はつか

twenty days; 20th (of month)

noun

十日

とおか

ten days; 10th (of month)

noun

Theme: Daily Life NounsJLPT N5

Why these get confused

Both refer to dates involving the number ten. The irregular reading "hatsuka" (20th) is a unique outlier that learners often mix up with the more predictable "tōka" (10th).

How to tell them apart

Anchor on the meaning, not the form. 二十日 (twenty days; 20th (of month)) and 十日 (ten days; 10th (of month)) live in adjacent semantic territory. Memorize the boundary, not just each word.
Shared kanji: 十, 日 appears in both. The other character is what changes the meaning — focus your attention there.
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

二十日 (twenty days; 20th (of month))

二十日に届きます。
一月二十日に会いましょう。

十日 (ten days; 10th (of month))

十日に届きます。
十日間旅行しました。

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

「二十日」の意味は？

A. twenty days; 20th (of month) (correct)
B. ten days; 10th (of month) (distractor)
C. (other plausible meaning)
D. (other plausible meaning)

Drill this pair until it sticks

Reading the explanation is step one. Targeted practice is what actually moves a confusion pair out of your weak list. Free, no signup needed to try.

Practice N5 confusion pairs

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Frequently asked

二十日 vs 十日

Why JLPT N5 learners mix up 二十日 (はつか, “twenty days; 20th (of month)”) and 十日 (とおか, “ten days; 10th (of month)”).

二十日

はつか

twenty days; 20th (of month)

noun

十日

とおか

ten days; 10th (of month)

noun

Theme: Daily Life NounsJLPT N5

Why these get confused

Both refer to dates involving the number ten. The irregular reading "hatsuka" (20th) is a unique outlier that learners often mix up with the more predictable "tōka" (10th).

How to tell them apart

Anchor on the meaning, not the form. 二十日 (twenty days; 20th (of month)) and 十日 (ten days; 10th (of month)) live in adjacent semantic territory. Memorize the boundary, not just each word.
Shared kanji: 十, 日 appears in both. The other character is what changes the meaning — focus your attention there.
Read the example sentences below. Seeing each word in its natural context builds a faster lookup than studying the dictionary form alone.