Sou, You, Mitai, Rashii: Four Ways to Say It Seems

Four seemings, four sources of evidence

Before any conjugation, fix the map. If your evidence is what your eyes report right now, use sō attached to the verb stem or the adjective root. If your evidence is reasoning from circumstances, use yō desu in careful speech or mitai in relaxed speech. If your evidence is a person, a forecast or a notice, use the plain form plus sō desu. If you are reporting hearsay at a distance, or describing what is typical of a category, use rashii.

Japanese speakers care about this because taking responsibility for a claim is part of politeness. Saying kaigi wa chūshi desu asserts the cancellation as fact. Saying chūshi da sō desu credits it to whoever told you, and chūshi no yō desu says you worked it out from an empty meeting room. Choosing the right one protects you when the information turns out to be wrong.

How each pattern attaches

Read the table down the two sō columns first. The hearsay column keeps the word whole and adds da after a na-adjective or a noun. The appearance column cuts something off: the masu-stem of the verb, the final i of the adjective, the na of a na-adjective. That cut is the fastest way to tell which sō a speaker just used.

Note the third column too. Yō desu is the only one that needs na after a na-adjective and no after a noun, because yō is itself a noun meaning appearance or manner. Mitai and rashii attach straight to the bare word.

Sou desu for what somebody told you

Attach sō desu to any plain form, present or past, positive or negative, and you are quoting a source without naming one. Ashita wa yuki ga furu sō desu means the forecast says snow tomorrow. Because it is a report, this sō never changes shape: there is no sō na or sō ni for hearsay, and there is no past form sō deshita. The tense lives in the plain form before it.

If you want to name the source, add it at the front with ni yoru to, or add kara kikimashita afterwards. Tenki yohō ni yoru to, ashita wa ame da sō desu is the natural news register, while Tanaka-san kara kikimashita ga, kaigi wa chūshi da sō desu is what you say when the source is a person and you want that on the record. Learners often skip this step and state the news flatly, which quietly makes them responsible for information they never verified.

Sou for what you can see coming

This sō is a judgement made from appearance, so it attaches to the part of the word that carries meaning. For verbs, take the masu-stem: furimasu becomes furisō, ochimasu becomes ochisō, nakimasu becomes nakisō. For i-adjectives, drop the final i: oishii becomes oishisō, takai becomes takasō. For na-adjectives, drop the na: taihen becomes taihensō. Plain nouns cannot take it at all.

Two forms are irregular and must be memorised. Ii becomes yosasō, not iisō, and nai becomes nasasō. The same sa appears when a negative i-adjective is involved: omoshirokunai becomes omoshirokunasasō. Once formed, this sō behaves like a na-adjective, so it becomes oishisō na kēki before a noun and oishisō ni tabemasu before a verb.

For the negative of appearance sō with verbs, most speakers say furi sō ni nai for it does not look like it will rain, or furanasasō desu in casual speech. Both are heard; furi sō ni nai is the safer written form.

Telling the two sou apart in one breath

In each pair only the join changes. Hearsay keeps the full word and adds da where a na-adjective or noun needs it; appearance removes a piece. Say the pairs aloud back to back until your mouth stops adding an extra i to oishisō, which is the single most common slip.

You desu for a conclusion you reasoned out

Yō desu says that the evidence in front of you supports a conclusion you have drawn yourself. You see shoes in the entrance and lights on, so dare ka iru yō desu. It is the most formal of the four, so it is what you use in a report, in a meeting, or when speaking to a customer, and it also sounds appropriately careful when you are guessing about somebody else's situation.

Watch the joins. A verb or i-adjective attaches directly, a na-adjective takes na, and a noun takes no. Yō itself is a noun, which is why it behaves like a na-adjective afterwards: yō na hito, yō ni narimashita. That second form is a whole pattern of its own for saying you became able to do something.

Mitai, the casual twin of you

Mitai means the same thing as yō desu but belongs to relaxed speech among friends, family and familiar colleagues. It attaches with no joining word at all: iku mitai, samui mitai, genki mitai, gakusei mitai. Add desu to keep it polite enough for ordinary workplace chat, and drop desu entirely with friends.

Mitai also carries the plain likeness meaning that English covers with like. Kodomo mitai means childlike, and yume mitai means dreamlike. In that use it behaves as a na-adjective: kodomo mitai na hito, yume mitai ni kirei desu. The more formal equivalent of that likeness use is no yō ni.

A useful reply when someone offers a mitai guess is hontō desu ka or sō mitai desu ne, which agrees while keeping the same level of certainty. The polite-versus-casual guide on this blog covers the register scale in more detail.

Rashii for hearsay and for typicality

Rashii has two jobs. The first is hearsay at a distance: you heard it somewhere, you are fairly confident, and you are deliberately not taking responsibility. Ashita wa yasumi rashii desu is close to apparently tomorrow is a holiday. Compared with sō desu it sounds less like a direct quote and more like something in the air.

The second job appears when rashii follows a noun that names a category. Then it means typical of, and the sentence is a judgement about character. Otoko rashii means manly, sensei rashii means teacherly, and haru rashii hi means a properly spring-like day. Because rashii behaves as an i-adjective, its negative is rashiku nai, as in kare rashiku nai desu for that is unlike him.

The same situation said four ways

Five rows because the two sō patterns are genuinely separate. If a listener asks dōshite desu ka, each row has a different answer ready: sora ga kurai kara, kasa ga nurete iru kara, tenki yohō de mimashita, dareka ga itte imashita. Being able to justify the choice is the test that the pattern has been learned rather than memorised.

Choosing in real time

• Ask what your evidence is before you open your mouth: eyes, reasoning, a source, or a stereotype.
• Eyes on something in progress: use the stem plus sō, and remember yosasō and nasasō.
• Reasoning from circumstances: yō desu at work or with strangers, mitai desu with friends.
• A forecast, a notice, a colleague: plain form plus sō desu, with da after nouns and na-adjectives.
• Vague or distant hearsay, or a claim about what is typical: rashii.
• When you truly do not know, kamo shiremasen is the honest fallback and commits to nothing.

The mistakes to correct first

• Saying iisō instead of yosasō, and naisō instead of nasasō.
• Dropping the da in ame da sō desu, which turns hearsay into an ungrammatical mix.
• Adding na to yō after a noun: it is gakusei no yō desu, never gakusei na yō desu.
• Using appearance sō with a plain noun, as in sensei sō desu. Use mitai, rashii or no yō desu instead.
• Trying to conjugate hearsay sō desu into a past form. Put the past on the verb before it: ikimashita becomes itta sō desu.
• Choosing mitai in a formal report, where yō desu is expected.