Japanese Conjecture: sou desu, you desu, rashii, mitai

English hedges with a small pile of phrases: I heard, it looks like, it seems, apparently, maybe. They feel interchangeable, and mostly they are.

Japanese is not interchangeable here. It has a set of endings that all translate roughly as "seems" or "apparently", and what separates them is a single question: how do you know?

Did someone tell you? Did you see it with your own eyes? Are you reasoning from evidence in front of you? Are you just guessing? Each answer has its own ending, and using the wrong one is not a small stylistic slip — it misrepresents where your information came from.

There is a second thing that makes this topic infamous. そうです means two completely different things, and the two are distinguished only by what comes before it. Same three syllables, same kanji-free spelling, opposite meanings. Learners meet both within a week of each other and conclude that Japanese is arbitrary. It is not: the attachment rule is exact, and once you see it the two never blur again.

そうです, the two-faced one

The Japanese in those two rows differs by two characters: 降る (furu) versus 降り (furi). The dictionary form gives you hearsay; the stem gives you appearance. That is the whole distinction.

Hearsay そうです: plain form

Hearsay そうです reports something you were told or read. You are not the source, and you are not vouching for it.

Whatever the plain form is, you keep it exactly and add そうです. For nouns and な-adjectives that means keeping the だ — 学生だそうです, never 学生そうです. The だ is doing its normal job as the plain copula; そうです just sits on top of it.

Two consequences. Hearsay そうです can carry any tense, because the tense belongs to the plain form underneath: 降ったそうです is "I hear it rained". And since it is a report, you can be wrong without having lied — the responsibility sits with whoever told you.

Appearance そうです: stem

Appearance そうです is a judgement you make from what you can see right now. Rain clouds gathering, and you say 雨が降りそうです (ame ga furi sou desu, "it looks like it is going to rain") — that is your eyes talking, not a weather forecast you heard.

Notice the い-adjective row: おいしい becomes おいしそう, losing its い — the same い-dropping rule as 高くない and 高すぎる. It also produces the best demonstration of the whole topic:

• おいしいそうです (oishii sou desu) — "I hear it is delicious" (hearsay: keep the い)
• おいしそうです (oishisou desu) — "it looks delicious" (appearance: drop the い)

One character apart, two different claims about how you know.

Two irregulars are worth memorising, because both are extremely common:

Never いいそうです for the appearance meaning — that is hearsay ("I hear it is good"), a perfectly good sentence but a different one.

Appearance そうです is a present-tense impression, and its negative is not built with じゃない. For "doesn't look delicious", Japanese uses なさそう (おいしくなさそうです) or そうにない — not おいしそうじゃない.

ようです: inference, and the formal-sounding one

ようです (you desu) says "it seems", and it is the one you reach for when you are reasoning from evidence in front of you — not seeing the thing directly, but concluding it.

• 誰か来たようです (dareka kita you desu, "it seems someone came") — you heard the door, or saw the shoes
• 雨が降ったようです (ame ga futta you desu, "it seems it rained") — the ground is wet

The attachment is the plain form, with one wrinkle for nouns:

That last row is where the errors live. Nouns take の, な-adjectives take な — 学生のようです and 元気なようです, never 学生なようです or 元気のようです.

みたい: the same thing, casually

みたい (mitai) means exactly what ようです means, in conversational register. It attaches more simply — no の, no な, everything takes the plain form directly:

• 誰か来たみたい (dareka kita mitai, "seems someone came")
• 学生みたい (gakusei mitai, "seems he is a student") — no の
• 雨が降ったみたい (ame ga futta mitai, "seems it rained")

Before a noun it becomes みたいな, and before a verb みたいに:

• 子供みたいな人 (kodomo mitai na hito, "a person who is like a child")
• 鳥みたいに飛ぶ (tori mitai ni tobu, "fly like a bird")

Both よう and みたい also mean "like", as in simile — 天使のようです and 天使みたい (tenshi mitai, "like an angel"). The inference reading and the simile reading come from the same word; context decides, and in practice it is never ambiguous.

らしい: apparent, and typical

らしい (rashii) is the hearsay-adjacent one. It means "apparently" — you did not see it and you were not told directly to your face; you gathered it, from a conversation, a message, a notice.

• 明日は雨らしい (ashita wa ame rashii, "apparently it will rain tomorrow")
• 彼は来ないらしい (kare wa konai rashii, "apparently he is not coming")

Attachment is direct, with no だ anywhere:

Note that row three: nouns take らしい bare. 学生だそうです is right for hearsay そうです, but 学生だらしい is wrong — らしい goes straight onto the noun.

らしい has a second life: "typical of"

This one catches learners by surprise, because it is not conjecture at all. らしい attached to a noun means "in the true manner of", "just like":

• 彼らしい (kare rashii, "just like him") — exactly what you would expect from him
• 学生らしい学生 (gakusei rashii gakusei, "a student who is a real student")
• 春らしい天気 (haru rashii tenki, "weather that feels like spring")

So らしい is doing two unrelated jobs. If the noun before it is the thing being judged, you are in "typical of" territory. If it is a claim being reported, you are in "apparently" territory.

かもしれません: I am guessing

The last member of the family is the weakest claim of all. かもしれません (kamo shiremasen) means "might be", "may", "possibly".

• 明日は雨かもしれません (ashita wa ame kamo shiremasen, "it might rain tomorrow")
• 彼はもう帰ったかもしれません (kare wa mou kaetta kamo shiremasen, "he might have gone home already")

In casual speech it shortens twice: かもしれない, then just かも — 雨かも (ame kamo, "might be rain"). Like らしい, it takes the plain form with no だ after nouns: 学生かもしれません (gakusei kamo shiremasen, "he might be a student"), not 学生だかもしれません.

The master table: how do I know?

This is the table to come back to. Read it as one question — where did this come from? — with a different ending per answer.

でしょう (deshou) sits at the confident end of the guessing scale; the separate deshou and darou article covers it, along with its plain form だろう.

Choosing between them

1. Did a person tell you, and are you reporting it? Hearsay そうです.
2. Are you looking at it and judging from appearance? Appearance そうです.
3. Are you working it out from clues? ようです — or みたい if you are being casual.
4. Did you pick it up from something you read or half-heard? らしい.
5. None of the above, you are just guessing? かもしれません.

A test that settles most real cases: if you can point at your evidence, it is ようです. Wet ground, shoes at the door, a light in a window. If you cannot point at anything at all, it is かもしれません.

Common mistakes for English speakers

• Using the dictionary form when you mean "looks like". 雨が降るそうです is "I hear it will rain". If you looked out of the window, the sentence is 雨が降りそうです. English's looks like and I hear are easy to swap by accident; in Japanese the swap changes the form of the verb, so the error is visible to every listener.
• Dropping the い from an い-adjective when you meant hearsay. おいしそうです means "it looks delicious". If you are repeating a recommendation, it is おいしいそうです, with the い intact.
• Writing いいそう for the appearance meaning. It is よさそうです (yosasou desu, "looks good"). いいそうです exists but means "I hear it is good".
• Forgetting だ before hearsay そうです with nouns. 学生そうです is wrong; 学生だそうです (gakusei da sou desu, "I hear he is a student") is right.
• Adding だ before らしい or かもしれません. The opposite error, and just as common. 学生らしい, 学生かもしれません — bare noun, no だ.
• Mixing up の and な before ようです. Nouns take の (学生のようです); な-adjectives take な (元気なようです). Swapping them is one of the most recognisable learner mistakes in Japanese.
• Using みたい in a formal email. みたい is conversational. In writing that needs to be polite, use ようです — same meaning, appropriate register.
• Treating らしい as pure hearsay. Its "typical of" meaning has nothing to do with evidence: 彼らしい is a comment on his character, not a report from anyone.
• Making an appearance そうです negative with じゃない. おいしそうじゃない is not how Japanese says it. Use なさそう: おいしくなさそうです (oishiku nasasou desu, "doesn't look delicious").
• Reaching for でしょう when you mean "maybe". でしょう expresses confidence. If you genuinely do not know, かもしれません is the honest form — and Japanese speakers notice the difference.

Where this pays off

This family is what makes Japanese sound like a language rather than a set of assertions. A Japanese speaker rarely states something flatly when the evidence is indirect, and the endings above are how that honesty is encoded. Getting them right is one of the clearest signals that you are not translating from English in your head.

The forms here sit on the plain form and the verb stem, so verb classification is the right background, and adjectives explain why おいしい loses its い but 元気 does not. For the confident end of the scale, deshou and darou is the next read.

Romaji.live drills these endings in full sentences, which is where they finally separate: 降るそうです and 降りそうです sit one character apart on the page and behave completely differently in a real line. Start on the interactive kana table if the characters still slow you down, take a practice session and type the hearsay and appearance patterns as they come up, and check any unfamiliar reading in the romaji converter.