と・
From quoted words to names and definitions
These forms all begin from the idea of presenting words, a label, or an idea as a unit. The quickest way to choose among them is to look at what comes next: a reporting verb, a comment, a category noun, a noun whose content is being supplied, or an explanation. That destination reveals whether you are quoting, naming, describing content, or defining.
Follow the material to its destination
First decide what job the quoted or labeled material must do.
Mark content before a compatible verb
と
The content is followed by a verb of saying, thinking, hearing, writing, answering, or a similar activity.
Quote casually or introduce a conversational topic
って
You are speaking casually and either marking quoted content or bringing up a noun or phrase for comment.
Its job cannot be identified from its shape alone; check for a following verb, an understood verb, or a following comment.
Report an act of saying
と言う・と言っていた
The sentence specifically reports what someone says or recalls what someone had said.
Connect a particular name to its category
name + という + general noun
You mean “a person, place, work, or thing called...”
Supply the content of a noun
plain-form statement + という + content noun
The following noun is a report, idea, fact, notice, possibility, or something else that contains the preceding statement.
State what something means
という意味だ
You are directly interpreting a word, sign, action, message, or situation.
Raise an item and then explain it
というのは
You want a full, neutral opening that prepares the listener or reader for an explanation.
Give a compact formal definition
とは
You are defining a term or idea concisely, especially in an essay, lecture, reference work, or formal question.
Invoke a familiar label
いわゆる + noun
The following expression is a conventional category or label that people are assumed to recognize.
It is often neutral and does not automatically express sarcasm.
Quotation is the starting point
With ordinary quotation, the material before と or って is the content being reported. Neutral と works in speech and writing; って belongs mainly to conversation. A full form built on 言う also tells us how the act of speaking is viewed. In particular, と言っていた often recalls an earlier message or something repeatedly said.
The same message in three frames
Mika earlier said that the library would close at six.
美香は、図書館は六時に閉まると話しました。
Mika said that the library closes at six.
AnalyzeThe neutral quotation marker connects the content to a compatible communication verb.
美香は、図書館は六時に閉まるって話してた。
Mika was saying that the library closes at six.
AnalyzeThe quoted content is the same, but the framing is conversational.
美香は、図書館は六時に閉まると言っていた。
Mika had said that the library closes at six.
AnalyzeThis explicitly looks back on what Mika had said earlier.
Takeaway: Choose between the first two mainly by register. Choose the third when the past viewpoint on the act of saying matters.
The separate conversational topic use
この新しい図書館って、夜も開いているの？
Speaking of this new library, is it open at night too?
AnalyzeNothing is being quoted. The form brings the library up as the subject of the following question.
A name before it, or a complete statement?
Before という, a short proper name normally identifies what the following category noun is called. A complete statement instead supplies the content of a following noun such as a notice, idea, fact, or report. In both patterns, looking at the noun after という is essential.
Three ways to build a definition
A speaker or writer is explaining two-factor authentication.
「二段階認証」は、二つの方法で本人を確認するという意味です。
Two-factor authentication means confirming a person's identity in two ways.
AnalyzeThis directly states the meaning.
「二段階認証」というのは、二つの方法で本人を確認する仕組みです。
Two-factor authentication is a system that confirms a person's identity in two ways.
AnalyzeThis raises the term as the item to be explained.
二段階認証とは、二つの方法で本人を確認する仕組みである。
Two-factor authentication is a system for confirming a person's identity in two ways.
AnalyzeThis is the most compact and formal of the three frames.
Takeaway: という意味だ says “means” directly; というのは opens a neutral explanation; とは gives a concise, writing-leaning definition.
A new name versus a recognized label
The naming pattern introduces the actual name of a particular person or thing. いわゆる instead places something under a label already used by people generally. It attaches directly to the noun, without an extra particle.
More examples across the family
店員は在庫がないと答えました。
The clerk answered that the item was out of stock.
Analyzeこの店って、朝早くから開いているね。
This shop opens early in the morning, doesn't it?
Analyze川沿いに「北風」というパン屋があります。
There is a bakery called Kitakaze by the river.
Analyze彼は来週戻ると言っていた。
He had said that he would return next week.
Analyzeこの表示は、カードが使えないという意味です。
This sign means that cards cannot be used.
Analyze予約が必要だという案内が入口に出ています。
There is a notice at the entrance saying that reservations are required.
Analyze「時差出勤」というのは、出勤する時間をずらす働き方です。
Staggered commuting is a work arrangement in which employees shift their starting times.
Analyze公共財とは、多くの人が共同で利用できる財やサービスである。
A public good is a good or service that many people can use collectively.
Analyzeこれは、いわゆる地域通貨の一種です。
This is a type of what is commonly known as local currency.
Analyze