The Difference Between「〜らしい」と「〜そうだ」の違い｜Japanese Grammar (N5–N3)

(Joy quoting news [Sou da] vs. Joy guessing from a scene [Rashii])

“I heard it will rain.” 雨が降るそうだ。 (Ame ga furu sou da) 雨が降るらしい。 (Ame ga furu rashii) Both mean “I heard…” or “It seems…”, but the reliability of the information is different. One is “Copy & Paste”, the other is “My Guess”. Let’s learn with Joy and Ken!

🗣 Conversation Scene

Joy and Ken are talking about a new restaurant.

Joy

ケンさん、駅前（えきまえ）に新しいお店ができたそうです。チラシに書いてありました。 (Ken, I heard a new shop opened in front of the station. It was written on a flyer.)

Ken

ああ、あの店ですね。いつも行列（ぎょうれつ）ができているから、人気（にんき）があるらしいですよ。 (Ah, that shop. There is always a long line, so “it seems” it is popular / “rumor has it” that it is popular.)

💡 Explanation

Where did the information come from?

Point 1: 〜Sou da (〜そうだ) = Hearsay (Direct)

Source: Clear (News, Specific Person, Report) You are simply passing on information you heard or read, without adding your own guess. It is “Copy & Paste” information. Key phrase: “According to…” (〜によると)

天気予報（てんきよほう）によると、雨だそうです。 (According to the forecast, it will be rain. [Fact transfer])
彼は来ないそうです。 (I heard [from him/someone] that he isn’t coming.)

Point 2: 〜Rashii (〜らしい) = Conjecture / Rumor

Source: Vague (Situation, Gossip, Appearance) You are making a guess based on information you gathered. “Based on the fact that everyone has umbrellas, it seems it is raining.” It is often used for rumors.

みんな傘（かさ）を持っている。外は雨らしい。 (Everyone has umbrellas. It seems/looks like it’s raining outside. [Inference])
あの二人は結婚（けっこん）するらしい。 (Rumor has it they are getting married.)

📊 Comparison Table

Phrase	Meaning	Certainty
〜そうだ (Sou da)	I heard that… (Reporting)	High (I am just reporting what I heard)
〜らしい (Rashii)	It seems that… (Guessing / Rumor)	Medium/Low (Based on situation)

🚧 Joy’s Mistake

(Joy reports the Boss’s exact words to Ken) ❌ Wrong: 社長は 3時に戻（もど）る らしい です。 (Tone: “Rumor has it the boss will be back at 3.” This sounds irresponsible! Did you not check properly?) ✅ Right: 社長は 3時に戻るそうです。 (Tone: “I heard (from the boss/secretary) that he will be back at 3.” This is reliable info.)