そうだ・
Choosing how to report information
Choose a reporting form by asking where the information comes from and what you are doing with it. You may be directly relaying a source, passing on a vague rumor, presenting a claim that society already repeats, or drawing your own conclusion from evidence. Formal wording can create distance, but it does not automatically make a claim more reliable.
Four questions narrow the choice
First, is there one identifiable source, or is the claim merely circulating? Second, are you passing on words or combining clues into a tentative conclusion? Third, is this fresh information, an established public view, or a conclusion supported by the evidence presented now? Finally, are you speaking casually, relaying a careful message, or writing an analytical report? These distinctions matter more than the English translation “apparently” or “it is said.”
A practical choice map
Directly relay received information
そうだ
You are neutrally passing on information from another person, an announcement, or another identifiable source.
This is the hearsay use after complete plain content, not the separate appearance pattern.
Leave the indirect basis in the background
らしい
Reports, clues, or both support a tentative statement, and the exact source need not be foregrounded.
Context decides whether the basis is a backgrounded report or a synthesis of clues.
Relay carefully or restate the practical meaning
ということだ・とのことだ
You are giving a careful sourced report, concisely relaying a message, or explaining what earlier information amounts to.
A report needs an explicit or understood source; a restatement needs earlier wording whose meaning is being clarified.
Present what people generally say
と言われている
A belief, reputation, or traditional claim is in general circulation and no original speaker matters.
Present an established status or held view
とされている・と考えられている
An institution or field accepts a classification, status, explanation, or judgment over time.
Use the first form for treatment or classification and the second for a considered explanation or judgment.
Name the source
によると・によれば
You want to identify the person, document, survey, forecast, or other source before giving its information.
This source phrase does not finish the report; information must follow it.
Pass on a vague rumor
とか
The information is informal and unconfirmed, and you deliberately leave its source or details vague.
Repeat what someone said to a familiar listener
んだって・だって
You are directly passing along another person's words in friendly conversation or an informal message.
Draw an analytical conclusion now
と考えられる
The observations or reasoning currently presented support a conclusion.
This is an evidence-based conclusion, not a way to say that somebody reported the claim.
A direct report or a tentative synthesis?
A city pool is expected to reopen on the tenth of next month.
市の発表によると、市民プールは来月十日に再開するそうです。
According to the city's announcement, the municipal pool will reopen on the tenth of next month.
Analyze掲示板に再開日の案内が出ている。市民プールは来月十日に再開するらしい。
A reopening notice has appeared on the bulletin board. Apparently the municipal pool will reopen on the tenth of next month.
AnalyzeTakeaway: そうだ passes on the announcement directly. らしい presents the reopening as a tentative conclusion supported by indirect information.
The same message in careful and familiar language
Yamada has sent a message saying that they will arrive around seven.
山田さんから連絡があり、到着は七時ごろになるとのことです。
Yamada contacted us to say that the arrival will be around seven.
Analyze山田さん、七時ごろ着くんだって。
Yamada says they'll arrive around seven.
AnalyzeTakeaway: とのことです is concise and suitable for a careful relay in email, workplace communication, or an announcement. んだって sounds like familiar spoken repetition.
What people say, what is established, and what the evidence supports
と言われている points to a claim that people repeat. とされている presents an accepted classification, rule, or status. と考えられている presents an explanation or judgment already held by a relevant community. Without the continuing ending, と考えられる gives a conclusion supported by the evidence at hand.
この湿地には珍しい鳥が来ると言われている。
It is said that rare birds visit this wetland.
Analyze条例では、この湿地は特別保護区域とされている。
Under the ordinance, this wetland is designated as a special protected area.
Analyze研究者の間では、水位の低下が鳥の数に影響すると考えられている。
Researchers generally believe that falling water levels affect the number of birds.
Analyze今年の観察記録では飛来数が大きく減っており、環境が変化していると考えられる。
This year's observation records show a sharp decline in visiting birds, so it is reasonable to conclude that the environment is changing.
AnalyzeTwo kinds of casual hearsay
There is talk of a cinema opening behind the station.
駅の裏に映画館ができるとか。
I heard something about a cinema apparently opening behind the station.
Analyzeユキが言ってたけど、駅の裏に映画館ができるんだって。
Yuki said that a cinema is going to open behind the station.
AnalyzeTakeaway: とか keeps the source and accuracy vague. んだって more directly passes along somebody's words.
Where each choice sounds natural
Swipe sideways to compare every column.
| Setting | Natural choices | Typical effect |
|---|---|---|
| Friends, family, informal messages | んだって for direct relay; とか for vague rumor | Familiar, conversational, and sometimes deliberately noncommittal |
| Ordinary conversation and general writing | そうだ and らしい | Neutral relay or a tentative statement based on indirect information |
| Careful messages, notices, and reports | ということだ, とのことだ, and によれば | Careful attribution or concise relay |
| Public explanations and institutional writing | と言われている, とされている, and と考えられている | Impersonal presentation of circulating claims, accepted status, or held views |
| Academic and analytical writing | と考えられる | A detached conclusion whose supporting evidence should be visible |
More examples across the family
ラジオのニュースでは、北口は工事のため閉鎖中だそうです。
The radio news says that the north entrance is currently closed for construction.
Analyze新しい店は来週開くらしい。
Apparently the new shop will open next week.
Analyze事務局から、受付は午前九時に始まるとのことです。
The administrative office says that registration will begin at nine in the morning.
Analyze春の虹は幸運のしるしだと言われている。
A rainbow in spring is said to be a sign of good luck.
Analyzeこの制度では、十六歳未満は子どもとされている。
Under this system, anyone under sixteen is classified as a child.
Analyze会社の資料によれば、海外の利用者が大幅に増えています。
According to company materials, the number of overseas users has increased substantially.
Analyze港の近くに新しい市場ができるとか。
I heard something about a new market apparently opening near the port.
Analyzeアキに聞いたんだけど、明日の練習は中止なんだって。
Aki told me that tomorrow's practice has been canceled.
Analyze三年間、利用者が増え続けており、この傾向は今後も続くと考えられる。
User numbers have continued to rise for three years, so it is reasonable to conclude that this trend will continue.
Analyze