〜というものだ

About

The ～というものだ pattern is used to make declarative value/judgment statements (think: "X is a thing that Y") about a given subject.

～というものだ statements are based on general sentiment/common sense, rather than the speaker's individual opinions.

～というものだ is always present-affirmative, and has no negative or past forms.

〜というものだ makes strong declarations based on generally accepted values.

E.g. 隣となりの芝しばは青あおく見みえるというものです。 "The grass is always greener on the other side."

E.g. 楽たのしいことも辛つらいこともある。それが人生じんせいというものだ。 "There are fun times, and there are hard times. That is life."

E.g. 人ひとの話はなしは最後さいごまで聞きくというものだ。 "When people are saying something, (one ought to) listen until the end."

～というものだ sounds relatively stiff in tone, and is most commonly used in polite spoken or written contexts. It is also possible in casual speech, but less common.

Summary

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  〜というものだ makes strong declarations based on generally accepted values

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  ～というものだ statements are based on general sentiment/common sense, rather than the speaker's individual opinions