What is the difference between "確か" and "たしか"?

"確か" means "certain, sure; if I remember correctly, I believe" (N4), whereas "たしか" represents "If I remember correctly; surely; certainly" (N3).

Kanji Homophone Battle

Pronunciation Trap: "たしか (tashika)"

Same sound, completely different Kanji! Choose the right conceptual writing.

Kanji Option A

たしか (tashika)

N4 / CEFR

Kanji Option B

たしか (tashika)

N3 / CEFR

In Japanese, many words share the exact same pronunciation "たしか (tashika)" but are written with different Kanji, changing the meaning entirely.

確か (Level: N4): Translates to "certain, sure; if I remember correctly, I believe" and is used when Can be an adjective.
たしか (Level: N3): Maps to "If I remember correctly; surely; certainly" and carries the nuance of As an adverb, it's used when you are fairly sure about something but not absolutely certain, often translated as 'if I remember correctly'..

Mixing these up can easily result in unnatural writing. Look at the bilingual context cards below to master the conceptual boundaries!

Bilingual Context for "確か"

彼の名前は確か田中さんです。

His name is Tanaka, I believe.

Bilingual Context for "たしか"

たしか、このお店は日曜日が定休日だったと思います。

If I remember correctly, this shop is closed on Sundays.

Which Kanji perfectly fits this blank space?

Which Kanji perfectly fits the blank: "彼の名前は＿＿＿田中さんです。" (Meaning: "His name is Tanaka, I believe.")

🎉 Correct Answer!

Correct! "確か" is used for "certain, sure; if I remember correctly, I believe" in the context: "His name is Tanaka, I believe.".