～よう (conjecture / likelihood)

• Reading: よう
• Romaji: you
• Formation: Verb (plain form) + ようだ / Noun + の + ようだ / Adj-い + ようだ / Adj-な + な + ようだ

Meaning

An auxiliary verb attached to the volitional stem expressing the speaker's conjecture about some potentiality or likelihood. It conveys 'it seems likely that' or 'it appears that ~ will.'

よう in this usage expresses the speaker's subjective conjecture about a potential situation or future event. It differs from the volitional よう (let's ~) and the manner-describing ように. Here, よう functions as a dependent noun meaning 'appearance' or 'likelihood,' often combined with だ to form ようだ. When used with verbs, it suggests the speaker has some basis — observation, experience, or indirect evidence — for believing something is likely. It is softer than はずだ (which implies strong logical expectation) and more grounded than かもしれない (which is pure possibility). Common forms include ようだ, ような, and ように.

Examples

1. 彼は何か隠しているようだ。 It seems like he is hiding something.
2. 外は雨が降っているようだ。 It appears to be raining outside.
3. このレストランは人気があるようで、いつも混んでいる。 This restaurant seems to be popular — it's always crowded.

Usage Guide

Context: spoken, written, everyday

Tone: observational

Do Say

• どうやら電車が遅れているようだ。
• 隣の部屋から音がするようだが、誰かいるのだろうか。
• 彼女は新しい仕事に満足しているようだ。

Don't Say

• 明日は日曜日のようだ。(ようだ is for conjecture based on evidence, not for stating known facts like what day it is) → 明日は日曜日だ。
• 私は疲れたようだ。(ようだ expresses conjecture about others or external situations; for your own feelings, use direct statement 疲れた) → 私は疲れた。

Origin & History

よう comes from 様 (さま/よう), meaning 'manner' or 'appearance.' The conjecture meaning developed naturally from describing how things appear — if something has the appearance of a certain state, the speaker infers it is likely so.

Cultural Context

Generation: All ages

Social background: Universal