Common mistakes Japanese learners make, and how to fix them

TUREFF• •0

Japanese is full of traps that catch nearly every learner, mostly because English habits leak into it. The good news is that the same mistakes come up again and again, so knowing them in advance saves you months. Here are the most common ones.

1. は and が

The classic. は marks the topic, what you are talking about; が marks the subject, often new or specific information.

誰が来ましたか。田中さんが来ました。(Who came? Tanaka came.) Not 田中さんは, because Tanaka is the new information.
私は学生です。(As for me, I am a student.)
猫が好きです。(I like cats.) With 好き, 嫌い, 上手 and できる, the thing liked or done takes が.

Question words such as 誰 and 何 never take は. The particles guide on this site explains topic and subject in more depth.

2. に and で for places

Both can translate as "at" or "in", which is why learners mix them.

に marks where something exists or where you go: 東京にいます (I am in Tokyo), 学校に行きます.
で marks where an action happens: 図書館で勉強します (I study at the library).

A test: if the verb is いる, ある, 住む or a movement verb, use に. If someone is doing something there, use で. 東京に住んでいます but 東京で働いています.

3. Using あなた

Textbooks teach あなた as "you", and learners use it in every sentence. In real life it can sound distant, presumptuous or even rude, especially to someone senior; it is also how some wives address their husbands. Use the person's name with さん, their title (先生, 部長), or leave "you" out entirely, which is what Japanese speakers do. The same goes for 彼 and 彼女, which often mean boyfriend and girlfriend.

4. Keigo mix-ups

Raising yourself: honorific verbs (sonkeigo) are for other people's actions. Saying 私がいらっしゃいます is a classic slip; use the humble 参ります or simply 行きます.
Double keigo: stacking honorific forms (おっしゃられる) sounds overdone. One honorific is enough.
Using casual speech too early: stay in です/ます form with anyone you are not close to until they switch.

The keigo guide on this site sets out the three levels with examples.

5. Kanji readings

Most kanji have more than one reading, and learners often pick the wrong one: 一日 is ついたち (the first of the month) or いちにち (one day), 今日 is きょう, and 大人 is おとな. Learn words, not single kanji, and learn the reading with the word. The kanji study guide explains how readings work.

6. Katakana English

Loanwords sound familiar but change in pronunciation and meaning:

マンション: a flat in a block, not a mansion.
テンション: excitement or mood (テンションが高い = hyped up).
スマート: slim, not clever.
サービス: free extra.

Pronounce them the Japanese way, with every vowel: マクドナルド, not "McDonald's", is what people will understand. See the katakana loanwords guide.

7. Pronunciation and length

Long vowels and double consonants change meaning: おばさん (aunt) and おばあさん (grandmother), きて (come) and きって (stamp). Count the beats; each kana takes the same time. Also watch ら行: it sits between English r, l and d.

8. Literal translation

"I am hungry" is お腹が空きました, not a sentence about "being" hungry.
"Thank you for the other day" (この間はありがとうございました) is expected the next time you meet someone who treated you; English has no equivalent.
Saying "no" directly often sounds blunt. Japanese softens refusals: ちょっと… (it's a little...) is often enough.
Too many pronouns: drop 私 when it is obvious.

9. Sentence endings and ね/よ

よ tells someone something they do not know; ね seeks agreement about something shared. Overusing よ can sound pushy, and leaving both off can sound flat. Listen to how native speakers use them.

How to fix mistakes faster

Learn whole sentences, not lists of words.
Shadow native audio: repeat immediately after the speaker.
Ask a teacher or exchange partner to correct you and write down the corrected sentence.

What mistake took you longest to notice? Share it, or ask about a sentence you are unsure of, in the comments.