“〜yō da”: Conjecture from Observation + Metaphor [JLPT N4]

Content by NTJ Kuma · Nihongo to Japan editorial team · Updated July 27, 2026

「起きているようだ」「夢のようだ」 — an inference from what you observe, or a “like …” comparison.

「電気がついてる、まだ起きてるようだ」 — 「〜ようだ」, guessing and simile

Seeing a friend's room still lit, you infer 「まだ起きてるようだ」 (seems they're still up) — 「ようだ」 has two uses: ① guessing appearance (seems, appears, judged from your own observation and clues); ② simile (like…). It's a member of the “guessing family” (ようだ／らしい／そうだ), distinguished by “reasoning from evidence you yourself see.” This guide focuses on 「ようだ」's two uses and quickly separates it from らしい／そうだ (the colloquial みたいだ has its own guide).

Core: guess from your own observation (＋ simile)

「ようだ」 has two uses:

• ① Guessing appearance (seems): judging from clues before you — 電気がついている、まだ起きているようだ (the light's on, seems they're still up).
• ② Simile (like…): 氷のように冷たい (cold like ice), まるで夢のようだ (just like a dream).

Trait: a “grounds, reasoning” flavor (I see X, so I judge Y). The colloquial version is 「みたいだ」 (its own guide).

How to Connect

Examples in context

• 彼の部屋に電気がついている。まだ起きているようだ。(His room's lit. He seems to be still up.) — guess (clue)
• 空が暗くなってきた。雨が降るようだ。(The sky's darkening. Seems it'll rain.) — guess
• 今日のパーティーには、彼も来るようだ。(He seems to be coming to today's party too.) — guess
• 彼女は氷のように冷たい態度だった。(Her attitude was cold like ice.) — simile
• この料理は、まるでプロが作ったようだ。(This dish is just like a pro made it.) — simile

⚠️ Where learners slip up

① ようだ (your own reasoning) vs らしい (heard) vs そうだ. ようだ = reasoning from your own observation/clues (電気がついている→起きているようだ); らしい = from external heard info (〜によると, I hear); hearsay-そうだ = direct relay of what's heard. ようだ has the strongest “I inferred it myself” flavor.

② Simile uses 「〜のように／〜のような」. 氷のように冷たい (cold like ice, ように before a verb/adjective), 天使のような人 (a person like an angel, ような before a noun). The simile ようだ is super useful, often with 「まるで (just like)」.

③ Attachment: noun ＋ の, na-adj ＋ な. 本物のようだ (✗ 本物ようだ), 元気なようだ (✗ 元気ようだ). Nouns add の, na-adjectives add な, then ようだ. (The colloquial みたいだ attaches directly — see 〈ようだ・みたいだ〉.)

🔄 Nuance & comparison: ようだ／らしい／そうだ

💡 The one thing to remember

The soul of 「ようだ」 is “from clues I myself see, I reason out ‘it seems…'” — 電気がついている (see evidence) → 起きているようだ (infer the conclusion). Two uses: ① guess (seems, your own judgment); ② simile (like…: 氷のように冷たい, まるで夢のようだ). Its role in the guessing family: ようだ = your own observation/reasoning; らしい = heard hearsay; appearance-そうだ = by looks about to; hearsay-そうだ = direct relay. Grasp that “ようだ is what I reasoned myself” and you won't confuse it with hearsay. The simile use (〜のように) is super handy — with 「まるで」 it's vivid. The colloquial 「みたいだ」 and more contrasts: see the 〈ようだ・みたいだ〉 guide.

❓ FAQ

Q: How do I tell 「ようだ」's guess from its simile?

By context. ① Guess “seems, appears”: judging from clues that “this is probably the case” (電気がついている、まだ起きているようだ = the light's on, seems they're still up — inferring a fact). ② Simile “like…”: likening A to B (describing) (彼女は氷のように冷たい = she's cold like ice — a simile, not literal ice). Test: “inferring whether something is true” = guess; “using another thing to describe” = simile. Simile often pairs with 「まるで (just like)」 (まるで夢のようだ = just like a dream) — with that word it's usually a simile.

Q: 「ようだ」 and 「らしい」 both mean “seems” — fastest way to tell them apart?

By the source of evidence: 「ようだ」 = reasoning from your own observation/clues (your own judgment): 道が濡れている、雨が降ったようだ ((I see) the road's wet, so I infer it rained). 「らしい」 = from external heard info (hearsay): 天気予報で、雨らしい ((I hear) the forecast says rain). Rule of thumb: what I saw and reasoned = ようだ; what others said, heard = らしい. With a clear source (〜によると, 〜で聞いた) use らしい; judging from clues before you, ようだ. (For the fuller guessing-family comparison, see the 〈ようだ・みたいだ〉 guide.)

🖊️ Practice Quiz

Q1. 「空が暗くなってきた。雨が降り___。」(looks about to rain, watching the sky)

(A) ようだ　(B) らしい　(C) そうだ(様態)　(D) そうだ(伝聞)

Q2. 「友達から聞いたんだけど、あの先生は来月退職する___。」(heard from a friend)

(A) ようだ　(B) らしい　(C) そうだ(様態)　(D) みたいだ

Q3. 「彼の部屋に電気がついている。まだ起きている___。」(inferring from one's own observation)

(A) ようだ　(B) らしい　(C) そうだ(様態)　(D) そうだ(伝聞)

Q4. 「今日のパーティーには彼女が来ない___よ。」(passing along some news)

(A) ようだ　(B) らしい　(C) そうだ(様態)　(D) みたいだ

Q5. Which sentence is grammatically wrong?

(A) 雨が降るようだ。

(B) 雨が降りそうだ。

(C) いいそうだ。

(D) 美味しそうだ。

Answer Key

1. (C) そうだ(様態) ── seeing the sky darken and judging rain is imminent → 様態 そうだ. 降りそうだ = ます-stem (降り) ＋ そうだ.

2. (B) らしい ── ‘heard from a friend' = hearsay → らしい (also そうだ伝聞: 退職するそうだ).

3. (A) ようだ ── inferring from one's own observation (the light is on) → ようだ.

4. (B) らしい ── passing along news/hearsay → らしい.

5. (C) いいそうだ ── the 様態 form of いい is irregular: よさそうだ (✗ いいそうだ/よそう).