Sections
Tashika (確か): what it means in anime
確か
たしか · tashika · certain; if I remember right JLPT N4
Tashika has two jobs. 確かに means "certainly" or "true, you have a point". 確か on its own means "if I remember right": 確か明日だった ("it was tomorrow, I think").
Where you hear it 5 of 42 series
Lines from the Japanese subtitles of episodes 1–3 of each show. A translation is shown only when it clearly matches the line; counts are subtitle lines containing the word.
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Horimiya · 6 lines in episodes 1–3 · this one from episode 2
確か 合同だよPretty sure we have a combined class.
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Haikyu!! · 9 lines in episodes 1–3 · this one from episode 1
確かに 俺はでかくないけど…
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Attack on Titan · 6 lines in episodes 1–3 · this one from episode 1
確かに ２人だけなら助けられる
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Noragami · 6 lines in episodes 1–3 · this one from episode 1
確かこの猫を追いかけてた時も
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My Hero Academia · 5 lines in episodes 1–3 · this one from episode 1
確かに そうかもしれない
Usage and nuance
確かに is the sound of someone conceding a point in an argument, and it is everywhere in anime banter. Horimiya and Haikyu use it in nearly every episode.
The hedging sense surprises learners because the kanji means "certain". The logic is "I'm fairly sure", and it lets a speaker commit to a fact without full confidence.
The verb 確かめる (tashikameru) is "to check, to make sure", and 確認 (kakunin) is "confirmation" in formal speech.
Hear 確か in Horimiya6 lines in episodes 1–3 · tappable subtitles · free, no account