How to say "straight" in Japanese

• まじCommon
  na-adjective, nounOnly the slang sense: 'straight' as in 'are you straight with me?' — serious, not joking. A colloquial abbreviation of casual speech; it never refers to a physically straight line, road or posture.
  「・・・おい・・・おい、先生せんせい！」「え？・・・あ、ああ」「マジだいじょうぶ？休講きゅうこうにしたら？」↗

  "...Hey...Hey, teacher!" "Eh? Oh." "Are you really OK? Shouldn't you cancel the lesson?"
• まっすぐJLPT N5approx.Common
  na-adjective, adverb, nounThe basic word for physical straightness: straight ahead, a straight line or road, sitting upright or standing erect; also 'direct' — a direct route or a direct manner. Usually written in kana alone.
  あなたはきのう放課後ほうかごまっすぐ帰宅きたくしましたか。↗

  Did you go straight home after school yesterday?
• ストレートCommon
  na-adjective, nounThe borrowed English word, for Western-flavored or technical 'straight': a straight pitch in baseball, a drink served straight, straight hair.
• 一路いちろCommon
  adverbMeans heading straight for a destination — 'straight for Tokyo' — going directly, without veering off. You meet it chiefly in written narrative, travel writing and headlines; it is not the word for giving directions.
• すっとJLPT N4approx.Common
  adverb, suru verbA mimetic adverb for quick, smooth, direct action: slipping straight in, leaving straight away, handing something over without hesitation. Its 'straight' is about directness of movement or response, never the shape of a line.
  カタツムリがすっと角かどを出だした。↗

  The snail shot out its horns.

Choose 「まっすぐ」 for physical straightness and direction, 「ストレート」 for loanword senses like a straight pitch or drink, 「まじ」 for slangy 'seriously', 「すっと」 for quick direct movement, and 一路 for heading straight toward a destination.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• まじserious
• まっすぐstraight (ahead)
• ストレートstraight
• 一路いちろstraight
• すっとstraight
• すっくとstraight
• すっくりstraight
• 直きなおきstraight
• 生のままできのままでstraight (e.g. whiskey)
• その足でそのあしでstraight (from one place to another)
• ずかずかrudely (barging in)
• 直留ちょくりゅうdirectly distilled
• 直線コースちょくせんコースstraight course
• まともにright (in front)
• 連チャンレンチャンrepeated events (e.g. meetings, drinking sessions)
• 端然たんぜんproper (appearance, posture, etc.)
• ぴっ(standing) straight
• 素直すなおstraight (e.g. hair)
• ストレッチstretch
• まともhonest
• 寸胴ずんどうhaving no waist
• しゃっきり(sitting) straight
• すぽんwith a pop (e.g. a cork being pulled out)
• すぽっと(with a) pop (i.e. sound of a cork, etc. being pulled out of a hole in one movement)
• すぽりwith a pop (e.g. a cork being pulled out)
• シャキッとrefreshingly
• ずっとstraight