Emphasis Particle よ

01

Providing New Information or Correction

This is the most fundamental use of よ (yoyoよヨ). It's used to present a fact, correct a misunderstanding, or answer a question with a sense of certainty. The speaker assumes they are bridging an information gap between them and the listener.

• このバスは駅に行きますよ。

  kono basu wa eki ni ikimasu yo.kono basu wa eki ni ikimasu yo.この ばす は えき に いきます よ.コノ バス ハ エキ ニ イキマス ヨ.

  This bus goes to the station, just so you know.

• それは塩じゃなくて、砂糖ですよ。

  sore wa shio janakute, satō desu yo.sore wa sio janakute, satô desu yo.それ は しお じゃなくて, さとう です よ.ソレ ハ シオ ジャナクテ, サトウ デス ヨ.

  That's not salt, it's sugar.

• 会議は三時からですよ。

  kaigi wa sanji kara desu yo.kaigi wa sanji kara desu yo.かいぎ は さんじ から です よ.カイギ ハ サンジ カラ デス ヨ.

  The meeting is from 3 o'clock.

02

Expressing a Strong Opinion or Judgment

When stating a personal opinion, adding よ (yoyoよヨ) gives it more weight and conviction. It implies that the speaker is very sure of their judgment and wants to convince the listener of their viewpoint.

• その映画は本当におもしろいよ。

  sono eiga wa hontō ni omoshiroi yo.sono eiga wa hontô ni omosiroi yo.その えいが は ほんとう に おもしろい よ.ソノ エイガ ハ ホントウ ニ オモシロイ ヨ.

  That movie is really interesting!

• 彼の日本語はとても上手だよ。

  kare no nihongo wa totemo jōzu da yo.kare no nihongo wa totemo jôzu da yo.かれ の にほんご は とても じょうず だ よ.カレ ノ ニホンゴ ハ トテモ ジョウズ ダ ヨ.

  His Japanese is very good, I'm telling you.

03

Giving Advice and Warnings

よ (yoyoよヨ) is frequently used when giving advice or a warning. It adds a sense of urgency or importance, signaling that the listener should pay attention for their own benefit.

• もっと野菜を食べた方がいいよ。

  motto yasai o tabeta hō ga ii yo.motto yasai o tabeta hô ga ii yo.もっと やさい を たべた ほう が いい よ.モット ヤサイ ヲ タベタ ホウ ガ イイ ヨ.

  You should eat more vegetables.

• その道は危ないから、気をつけてよ。

  sono michi wa abunai kara, ki o tsukete yo.sono miti wa abunai kara, ki o tsukete yo.その みち は あぶない から, き を つけて よ.ソノ ミチ ハ アブナイ カラ, キ ヲ ツケテ ヨ.

  That road is dangerous, so be careful!

04

Making Strong Requests or Commands

When attached to a command or request form, よ (yoyoよヨ) makes the utterance more forceful and insistent. It can convey a sense of urgency, impatience, or even frustration.

• 早く宿題をしなさいよ！

  hayaku shukudai o shinasai yo!hayaku syukudai o sinasai yo!はやく しゅくだい を しなさい よ!ハヤク シュクダイ ヲ シナサイ ヨ!

  Do your homework now!

• ちゃんと聞いてよ。

  chanto kiite yo.tyanto kiite yo.ちゃんと きいて よ.チャント キイテ ヨ.

  Listen to me properly!

• もう電話しないでよ。

  mō denwa shinaide yo.mô denwa sinaide yo.もう でんわ しないで よ.モウ デンワ シナイデ ヨ.

  Don't call me anymore!

05

Offering Reassurance or Encouragement

With a softer intonation, よ (yoyoよヨ) can be used to reassure or encourage someone. In this context, it conveys confidence in a positive outcome, making the statement sound more comforting and convincing.

• 心配しないで。大丈夫だよ。

  shinpai shinaide. daijōbu da yo.sinpai sinaide. daijôbu da yo.しんぱい しないで. だいじょうぶ だ よ.シンパイ シナイデ. ダイジョウブ ダ ヨ.

  Don't worry. It's okay.

• 君なら絶対にできるよ。

  kimi nara zettai ni dekiru yo.kimi nara zettai ni dekiru yo.きみ なら ぜったい に できる よ.キミ ナラ ゼッタイ ニ デキル ヨ.

  You can definitely do it.

06

Contrast with the Particle ね

Learners often confuse よ (yoyoよヨ) with ね (neneねネ). The key difference lies in shared information.

- Use よ (yoyoよヨ) when you assume the listener does not know the information. It's a one-way notification from speaker to listener.

- Use ね (neneねネ) when you assume the listener already knows the information and you are seeking agreement or confirmation. It creates a sense of shared experience.

Compare these two sentences:

• 今日は暑いですよ。

  kyō wa atsui desu yo.kyô wa atsui desu yo.きょう は あつい です よ.キョウ ハ アツイ デス ヨ.

  It's hot today. (Said to someone who just came indoors, providing them with new information).

• 今日は暑いですね。

  kyō wa atsui desu ne.kyô wa atsui desu ne.きょう は あつい です ね.キョウ ハ アツイ デス ネ.

  It's hot today, isn't it? (Said to someone who is experiencing the same hot weather as you, seeking agreement).

07

Formality and Gender

The politeness of よ (yoyoよヨ) depends on the verb form it follows.

- Attaching よ (yoyoよヨ) to the plain form (e.g., 行くよ (iku yoiku yoいく よイク ヨ)) is casual and used with friends and family. In this form, it can sound more assertive and is often used more by male speakers.

- Attaching よ (yoyoよヨ) to the polite -masu/-desu form (e.g., 行きますよ (ikimasu yoikimasu yoいきます よイキマス ヨ)) is polite and can be used by anyone in a wide range of situations.

• もう帰るよ。

  mō kaeru yo.mô kaeru yo.もう かえる よ.モウ カエル ヨ.

  I'm going home now. (Casual)

• 失礼します。もう帰りますよ。

  shitsurei shimasu. mō kaerimasu yo.sitsurei simasu. mô kaerimasu yo.しつれい します. もう かえります よ.シツレイ シマス. モウ カエリマス ヨ.

  Excuse me. I'll be going home now. (Polite)