～そうだ (Appearance): How to Say "Looks Like…" in Japanese

Appearance ～そうだ is the suffix that turns a verb or adjective into "looks like" or "seems." It reports the speaker's on-the-spot impression of how something appears.¹ Its key formal signature is attachment to the stem, not the plain form. That is also what separates it from the identical-looking hearsay ～そうだ. This article covers the N4 core of that pattern.²

Overview

What appearance そうだ means

Appearance そうだ (様態 yōtai, "manner / state") expresses the speaker's conjecture about a future event or a present state. The conjecture is based on what the speaker directly sees or feels. It can be used only when the speaker directly observes the thing in question.¹

The conjecture rests on perceptual evidence rather than reasoning. Makino and Tsutsui describe the form as used "when the speaker's conjecture is based primarily on visual or other perceptual evidence," in contrast with かもしれない, whose conjecture rests on logical reasoning.³

In meaning, the form attaches to an event the speaker has not yet confirmed as real (非現実, here "not yet confirmed to be or become real," not "counterfactual"). It says that the present, observed situation is close to that event.⁴

このケーキはおいしそうです。⁵
"This cake looks delicious."

It reports an impression, not a fact. Because of that, it cannot describe a past event in the same way it describes a present one. The past reading is carried by the conjugated unit そうだった, not by そうだ attached to a past base.¹

Where it sits among the inferential suffixes

Appearance そうだ belongs with ようだ, らしい, and みたい in the set of inferential, or evidential, suffixes. These suffixes mark how the speaker reached a claim. Within that set, そうだ is the perception-based, "seeing"-type member, unlike hearsay そうだ and report-leaning らしい.³²

Its nearest formal twin is ようだ. ようだ rests on already-secured evidence the speaker reasons from, whereas appearance そうだ rests on the bare outward sign perceived at the moment.⁵ The two have been analyzed side by side in dedicated academic work because both can mean "seems / appears," but they differ in evidential basis.⁴

Register and politeness

The plain predicate form is そうだ; the polite form is そうです. After そう attaches, the whole unit inflects like a な-adjective. It takes だ／です and the past forms そうだった／そうでした.¹⁶

そう behaves as a な-adjective after it attaches

Because the attached unit is a な-adjective, it also produces a prenominal form, そうな, and an adverbial form, そうに. This matches how ordinary な-adjectives produce な and に forms.¹⁵ This single fact explains every shape そう takes in a sentence.

The form is register-neutral: そうだ in plain speech and writing, そうです in polite speech, with no inherent formality restriction beyond the だ／です choice itself.¹

Formation

い-adjectives: drop い, add そう

For an い-adjective, drop the final い, which marks the stem, and attach そう directly to that stem.¹⁷ This is the same stem that other い-adjective inflections build on. The い is removed, and そう takes its place.⁷

あの車くるまは高たかそうだ。¹
"That car looks expensive."

このお菓子かしはおいしそうだ。¹
"This sweet looks delicious."

な-adjectives: attach そう directly to the stem

For a な-adjective, attach そう directly to the stem, with no な and no だ before it: 元気 → 元気そう, 静か → 静かそう, 暇 → 暇そう.¹² The stem that takes そう is the same bare form a な-adjective uses before だ. In other words, そう goes where the copula would go.²

このあたりは静しずかそうだ。¹
"This neighborhood looks quiet."

彼かれは暇ひまそうです。²
"He looks like he has free time."

Verbs: attach そう to the ます-stem

For a verb, attach そう to the ます-stem (連用形): 降る → 降りそう, 落ちる → 落ちそう, 話す → 話しそう, 食べる → 食べそう.¹²

With verbs, the reading is typically about likelihood or imminence ("about to," "looks like it will happen"). With adjectives, the reading is typically a present property judged from appearance. The Japan Foundation states that adjective + appearance そうだ mostly expresses an impression from outward appearance, while verb + appearance そうだ mostly expresses the likelihood that an event will occur.²

雨あめが降ふりそうだ。¹
"It looks like it's going to rain."

この家いえは強つよい風かぜが吹ふいたら倒たおれそうだ。¹
"It looks like this house will fall down if a strong wind blows."

Master formation table

The table below gives one row per word class. It also flags the two irregular stems, which the next section explains.

Word class	Dictionary form	Stem taken by そう	+ そう (appearance)
い-adjective	おいしい	おいし (drop い)	おいしそう
い-adjective	高い	高 (drop い)	高そう
な-adjective	静か(だ)	静か	静かそう
Verb	降る	降り (ます-stem)	降りそう
Verb	落ちる	落ち (ます-stem)	落ちそう
Irregular: いい / 良い	いい	よ (reverts to よ-)	よさそう (see The two irregulars)
Irregular: ない	ない	な	なさそう (see The two irregulars)

The い-stem, な-stem, and ます-stem columns show the standard appearance attachment rule.¹² The いい and ない rows are the two exceptions where a さ is inserted before そう. The next section explains them.¹

The two irregulars

いい → よさそう

いい "good" changes to よさ before そう, giving よさそう, never *いそう.¹ いい cannot take the regular path because it has no usable plain stem of its own. It reverts to the suppletive よ- stem, the replacement stem used in its other inflected forms, and a さ is then inserted before そう.¹

このアパートはよさそうだ。¹
"This apartment looks good."

今日きょうは天気てんきがよさそうです。¹
"The weather looks good today."

The negative なさそう vs ～なそう

With the adjective ない, the existential negative adjective in 問題がない, insert さ before そう: 問題はなさそうだ.¹ A negative い-adjective likewise inserts さ on the ～くない ending: おいしくない → おいしくなさそう, 新しくない → 新しくなさそう.¹

The さ-versus-no-さ split tracks whether ない is the adjective ない or the verb-negative auxiliary ない. As summarized by Hosono, 豊田 (1998) analyzes すまなさそう (with さ) as treating すまない as two units: すむ plus a non-existence ない. In that analysis, the adjectival ない is felt, so さ appears. By contrast, すまなそう (no さ) treats すまない as one lexicalized adjective, so さ drops. 豊田 found no meaning difference between the two, with the choice varying by individual and by word.⁸

問題もんだいはなさそうだ。¹
"There doesn't seem to be a problem."

加藤かとうさんは学生がくせいじゃなさそうだ。¹
"Mr. Katō doesn't look like a student."

With a verb negative, the auxiliary ない is involved. The textbook-standard verb negative of appearance そうだ is the ます-stem plus そうにない／そうもない, not the ～なさそう pattern. 降る gives 降りそうにない rather than 降らなさそう as the prescribed negative.¹⁹

Both verb negatives are in fact heard. 豊田 (1998) records 動詞 + ～なさそうだ (降らなさそうだ) and 動詞 + ～なそうだ (降らなそうだ) alongside ～そうに(も)ない. 野田 (2003) reports the verb ～な(さ)そうだ form spreading, especially among younger speakers.⁸

The verb negative forms sit beyond the N4 core

The verb negatives ～そうにない／～そうもない and the verb ～な(さ)そうだ are placed at a higher band, around N2, in some learner syllabuses. Treat them as the natural extension of the N4 pattern rather than part of its first layer.⁹ A learner study even found that learners understood な(さ)そうだ more readily than そうではない or そうに(／も)ない. This suggests that textbook coverage and real usage diverge here.⁹

A reading-based tendency governs which verb negative a speaker chooses. As summarized by Hosono, 豊田 (1998) found ～な(さ)そう preferred when a sentence foregrounds the present, eye-witnessed state. ～そうに(も)ない is preferred when it foregrounds a prediction of what will happen.⁸

村山むらやまさんの家いえはあまり新あたらしくなさそうだ。¹
"Mr. Murayama's house doesn't look very new."

Using そう in a sentence

As a predicate: 〜そうだ / 〜そうです

Used sentence-finally, the predicate is そうだ (plain) or そうです (polite). The unit inflects as a な-adjective.¹⁶ The past form そうだった／そうでした reads "looked like it (at the time)," reporting a past impression rather than a current one.¹

このステーキはおいしそうだった。¹
"That steak looked delicious."

Modifying a noun: 〜そうな

To modify a noun, use the prenominal form そうな. The な confirms that そう behaves as a な-adjective: 高そうな車, おいしそうなケーキ.¹⁵¹⁰

高たかそうな車くるまですね。¹
"That's an expensive-looking car, isn't it."

おいしそうなケーキ。⁵
"A delicious-looking cake."

Modifying a verb: 〜そうに

To modify a verb, use the adverbial form そうに: おいしそうに食べる "eat as though it is delicious," 楽しそうに勉強する "study while looking like one is enjoying it."⁵

彼女かのじょはおいしそうにケーキを食たべる。⁵
"She eats the cake as if it's delicious."

この人ひとは楽たのしそうに勉強べんきょうしています。⁵
"This person is studying as though enjoying it."

Saying a verb is NOT about to happen: 〜そうにない / 〜そうもない

For the verb (imminence) reading, the negative is built on the ます-stem plus そう plus にない／もない: 降りそうにない／降りそうもない "doesn't look like it will rain." Makino and Tsutsui give Vます そうに／もない as the standard form, because the negative form of a verb usually does not come before そうだ.¹

Both にない and もない occur in this slot, and にもない is also attested. They share the meaning "the event has a very low, near-zero likelihood of happening."¹⁸

This idiomatic verb negative is distinct from the adjective-style 降らなさそう. A common nuance is that 降りそうにない reads as a low-likelihood prediction (the forecast said rain, but the sky does not look like it will). 降らなさそう reads more as judging the present scene directly (no rain clouds in sight, so it should hold for a while).⁸

雨あめが降ふりそうにない。¹
"It doesn't look like it's going to rain."

クリスは車くるまを売うりそうにない。¹
"Chris doesn't seem like he'll sell his car."

この問題もんだいは学生がくせいには解とけそうもない。¹
"It doesn't seem like the students can solve this problem."

Nuance and usage contexts

The visual-inference restriction

Appearance そうだ requires the conjecture to rest on a sign or outward appearance (兆候・外観) the speaker perceives at the moment. It cannot be used for something the speaker already knows from prior, secured knowledge.³⁵

This gives the standard contrast: when looking at a cake, このケーキはおいしそうだ is right because the judgment comes from appearance. Once someone is actually eating it, the deliciousness is no longer an inference from appearance, so appearance そう no longer fits.⁵

このケーキはおいしそうですね。³
"This cake looks good, doesn't it."

Appearance そう needs direct observation, not reasoning

The basis is perceptual, not logical. A guess from reasoning takes かもしれない, but appearance そうだ requires direct observation. That is why このケーキはおいしいかもしれませんね, said about a cake right in front of you, is odd where おいしそうですね is natural.³

Appearance そう vs hearsay そうだ: the stem-vs-plain-form test

The two そうだ forms are told apart by what they attach to. Appearance (様態) そうだ attaches to the い-/な-adjective stem and the verb ます-stem. Hearsay (伝聞) そうだ attaches to the plain form (普通形) of the whole clause.²

So 降りそうだ (ます-stem 降り + そうだ) is "it looks like it will rain." 降るそうだ (plain form 降る + そうだ) is "I hear it will rain." That single stem-versus-plain-form difference carries the entire meaning split.² The contrast is central to the topic, so it is worth seeing it drawn out.

With い-adjectives, the same test appears as dropped versus kept い: おいしそうです (drop い) is "looks delicious," while おいしいそうです (keep い) is "I hear it's delicious."⁷

雨あめが降ふりそうだ。¹
"It looks like it's going to rain."

あのケーキはおいしいそうです。⁷
"I've heard that cake is delicious."

There is also a structural asymmetry. A bare noun plus だ can precede hearsay そうだ (学生だそうだ "I hear he's a student"), but it cannot form appearance そうだ. The appearance meaning over a noun is carried by other forms instead.¹

Why it marks appearance, not secured knowledge or hearsay

The durable restriction is about evidence type, not about a fixed list of forbidden senses. Appearance そうだ is restricted to conjecture from a perceived sign or outward appearance, and to events the speaker treats as not yet confirmed real. It does not relay information the speaker only heard. That is the job of the separate hearsay そうだ.⁴²

A perceived sign need not be purely visual. The form is not blocked from things that make sound or have taste as such: 鳴りそう "about to ring" is a normal appearance そう built on imminence. What blocks it is secured, non-appearance knowledge, as with deliciousness judged while already eating.⁵

For evidence types outside that immediate-appearance space, the neighboring inferentials take over: ようだ for a conclusion reasoned from secured evidence, and らしい for a report-leaning inference. The full evidence-type comparison is in the hub.⁵

Good to know

The さ that appears and disappears

Short forms grow a さ cushion before そう; long ones do not. The two single-syllable-stem adjectives いい and ない, plus the negative adjective ending ～くない, insert さ before そう: よさそう, なさそう, おいしくなさそう. Ordinary adjectives and verb stems attach そう directly with no さ: 高そう, 降りそう.¹

It helps to picture a cushion because the irregular forms are exactly the ones whose stem would otherwise be too short to carry そう clearly. The さ is the audible padding that holds the form together.¹

Conjugating the base word before adding そう

A common error is putting tense or negation on the base word first, as in 高かったそう for "it looked expensive." The correct form puts the tense on the whole unit: 高そうだった.

あの車くるまは高たかそうだった。¹
"That car looked expensive."

Appearance そうだ attaches to the bare stem, not to an already-tensed or already-negated form. Tense and the copula go on the whole そう-unit afterward (そうだった, そうじゃない), because そう makes the word behave as a な-adjective.¹⁶ If you put tense or negation on the base before そう, you get either a non-form or the unrelated hearsay reading.¹

One form, two readings, split by predicate type

With adjectives, appearance そうだ tends to read as a present property judged from appearance (おいしそう "looks delicious"). With verbs, it tends to read as imminence or likelihood (降りそう "about to rain," 倒れそう "about to fall down"). Both are the same appearance そうだ, distinguished only by whether the base is an adjective or a verb.²

The descriptive literature splits the verb side further into sub-readings such as 予測 "prediction," 寸前 "on the verge," and 非実 "hyperbolic," as in 手がもげそう "my arm feels like it'll fall off." These are sub-readings of the one appearance そうだ, not separate grammar.⁸

Two different 助動詞 that surfaced as the same shape

Appearance (様態, yōtai, "manner / state") そうだ and hearsay (伝聞, denbun, "hearsay") そうだ are analyzed as distinct auxiliaries that happen to share the surface form そうだ. They differ in attachment (stem versus plain form) and in meaning (perceived appearance versus relayed report).⁴²

Reading the modern form through this split makes the otherwise puzzling pair 降りそうだ / 降るそうだ predictable, rather than something to memorize.²

See also

• ～そうだ (Hearsay): How to Say "I Heard That" in Japanese
• Inferential Suffixes in Japanese: ～そう, ～よう, ～らしい, ～みたい Compared
• The ～げ Suffix: How to Say Someone "Looks / Seems" a Feeling in Japanese (悲しげ, 楽しげ)
• ～がる: How to Say Someone "Shows Signs of" a Feeling in Japanese
• Japanese Adjectives Overview: The Two Classes (い-形容詞 vs な-形容詞)

References

Footnotes

1. Makino, Seiichi, and Michio Tsutsui. A Dictionary of Basic Japanese Grammar (日本語基本文法辞典). Tokyo: The Japan Times, 1989, pp. 410–412 (entry "～sōda₂", appearance). (Romanization in this source: long ō written without a macron as "soda"; reproduced here in Modified Hepburn. Gives the attachment rule {Vmasu / Adj(i / na) stem} + そうだ, the meaning "the speaker's conjecture based on visual information ... only when the speaker directly observes something," the いい→よさ / ない→なさ irregular, the N-cannot-precede rule, the verb negative Vmasu そうに／そうもない, the past そうだった, and the prenominal そうな.) ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴ ↩¹⁵ ↩¹⁶ ↩¹⁷ ↩¹⁸ ↩¹⁹ ↩²⁰ ↩²¹ ↩²² ↩²³ ↩²⁴ ↩²⁵ ↩²⁶ ↩²⁷ ↩²⁸ ↩²⁹ ↩³⁰ ↩³¹ ↩³² ↩³³ ↩³⁴ ↩³⁵ ↩³⁶ ↩³⁷ ↩³⁸ ↩³⁹ ↩⁴⁰ ↩⁴¹ ↩⁴² ↩⁴³

2. 国際交流基金 (The Japan Foundation). 「日本語教育通信 文法を楽しく『そうだ／ようだ／らしい』(1)」. https://www.jpf.go.jp/j/project/japanese/teach/tsushin/grammar/201012.html (Public language-education body; gives the 様態/伝聞 attachment contrast (stem for 様態, plain form for 伝聞) and the note that adjective + 様態 そうだ tends to express an impression from outward appearance while verb + 様態 そうだ tends to express the likelihood that an event will occur.) ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹² ↩¹³ ↩¹⁴

3. Makino, Seiichi, and Michio Tsutsui. A Dictionary of Basic Japanese Grammar. Tokyo: The Japan Times, 1989, p. 176 (entry "kamoshirenai", Related Expression II). (Gives the perceptual-evidence vs logical-reasoning contrast: "Vmasu / Adj(i / na) stem そうだ is used when the speaker's conjecture is based primarily on visual or other perceptual evidence, but kamoshirenai is not.") ↩ ↩² ↩³ ↩⁴ ↩⁵

4. 大場美穂子 (Oba, Mihoko). 「いわゆる様態の助動詞『そうだ』再考 ―『ようだ』との比較―」. 日本語と日本語教育 (慶應義塾大学日本語・日本文化教育センター), No. 43, 2015, pp. 1–18. https://koara.lib.keio.ac.jp/xoonips/modules/xoonips/detail.php?koara_id=AN00189695-20150300-0001 (Defines 様態 そうだ as attaching to a 非現実 ("not-yet-confirmed-as-real") event and asserting that the present situation is in close proximity to that event; restates the author's 大場 1999 definition.) ↩ ↩² ↩³ ↩⁴

5. 日本語参照文法 (Sansyo Reference Grammar). 「34 そうだ様態①」. https://www.sansyo-bunpo.net/ (Reference grammar; gives the 兆候・外観 ("sign / outward appearance") basis, the contrast that establishes the perceptual restriction, and the そうな (attributive) / そうに (adverbial) modifying forms with examples.) ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰ ↩¹¹ ↩¹²

6. Bunpro. Grammar point そう (appearance). https://bunpro.jp/grammar_points/%E3%81%9D%E3%81%86 (limitation: learner platform; cited for the JLPT band placement, given as N4, and the "functions as a な-adjective once attached" framing.) ↩ ↩² ↩³

7. Tofugu. "Japanese い-Adjective そう Form." https://www.tofugu.com/japanese-grammar/adjective-sou/ (limitation: learner platform; cited for the drop-い formation of the い-adjective path and the kanji-keeping contrast with hearsay おいしいそうです.) ↩ ↩² ↩³ ↩⁴

8. 細野英里子 (Hosono, Eriko). 「様態の『そうだ』について ―否定的表現形式を中心に―」. 語文論叢 (千葉大学), No. 28. https://opac.ll.chiba-u.jp/da/curator/900116937/gobun28_hosono.pdf (Surveys the three negative forms of 様態 そうだ (～そうではない / ～そうにない / ～な(さ)そうだ), summarizes the 大場 1999 five-way use classification 推測・様態・予測・寸前・非実, the 豊田 1998 adjective-vs-verb negative taxonomy, and 野田 2003 on the spread of verb ～な(さ)そうだ among younger speakers.) ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶

9. 宮口徹也 (Miyaguchi, Tetsuya). 「雨は『降りそうにない』のか『降らなさそう』なのか ―ソウダ否定表現の扱いと学習者の知識との隔たりに注目して―」. 日本語教育方法研究会誌, Vol. 25, No. 2, pp. 42–43. https://www.jstage.jst.go.jp/article/jlem/25/2/25_42/ (Questionnaire study of how learners understand the negative expressions of 様態 そうだ. Author's own English romanization: "furi soo ni nai," "furana(sa) soo da," "soo da." Finds learner understanding of な(さ)そうだ generally higher than of そうではない and そうに(／も)ない, against textbook coverage.) ↩ ↩² ↩³

10. Bunpro. Grammar point そうに・そうな (appearance). https://bunpro.jp/grammar_points/%E3%81%9D%E3%81%86%E3%81%AB-%E3%81%9D%E3%81%86%E3%81%AA (limitation: learner platform; cited for the JLPT N4 placement of the そうに adverbial / そうな attributive forms treated together.) ↩