Why do JLPT N3 learners confuse 記入 with 爆発?

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 記入 or 爆発 more common on JLPT N3?

Both appear in the JLPT N3 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 General Verbs (3) theme of N3 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 N3 · Intermediate · Meaning confusion

記入 vs 爆発

Q: What's the difference between 記入 and 爆発?

記入 (きにゅう) means "entry, filling in of forms" and 爆発 (ばくはつ) means "explosion, detonation, eruption". The high stroke count and visual density of the Speech radical in 記 and the Fire radical in 爆 can lead to misidentification. Conceptually, a learner might link the 'entry' of data with the 'explosion' of the situation being reported.

Why JLPT N3 learners mix up 記入 (きにゅう, “entry, filling in of forms”) and 爆発 (ばくはつ, “explosion, detonation, eruption”).

記入

きにゅう

entry, filling in of forms

verb

爆発

ばくはつ

explosion, detonation, eruption

verb

Theme: General Verbs (3)JLPT N3

Why these get confused

The high stroke count and visual density of the Speech radical in 記 and the Fire radical in 爆 can lead to misidentification. Conceptually, a learner might link the 'entry' of data with the 'explosion' of the situation being reported.

How to tell them apart

Anchor on the meaning, not the form. 記入 (entry, filling in of forms) and 爆発 (explosion, detonation, eruption) 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

記入 (entry, filling in of forms)

用紙に自分の名を記入した。
生年月日をご記入ください。

爆発 (explosion, detonation, eruption)

トムは怒りを爆発させた。
爆発の原因は何だったの？

How JLPT tests this pair

On JLPT N3, 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

「記入」の意味は？