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How to say 'Theory' in Japanese | 理論

Wondering how to say 'Theory' in Japanese? You're in the right place!

The Japanese word for Theory is 'Riron', written as 理論 in Japanese.'Theory' in hiragana is りろん.

    word

    理論

    Meaning

    Theory

    Reading

    りろん

    riron

    Kanji

    理Reason 論Theory, Argument

    Explanation

    The Japanese noun '理論 (りろん)' means 'theory'. It refers to a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained. This word is often used in academic, scientific, and philosophical contexts. For example: His theory is widely accepted「彼の理論は広く受け入れられている」(かれのりろんはひろくうけいれられている). We need to test this theory「この理論を検証する必要がある」(このりろんをけんしょうするひつようがある). The word can also be used in everyday contexts to refer to a personal opinion or idea that someone has about how something works or should work.

    Part Of Speech

    noun

    Kanji JLPT

    N3

    Kanji Grade

    6

    Frequency

    1297

    Composition

    kanji

    Handwriting

Kanji in the Word 理論

This word contains 2 kanji characters:

  • kanji

    理

    Meaning

    Reason

  • kanji

    論

    Meaning

    Theory, Argument

Words Related to 理論 Through the Kanji 理

These 33 Words contain the Kanji 理 as well.

  • word

    理由

    Meaning

    Reason

  • word

    料理

    Meaning

    Cooking, Cuisine

  • word

    無理

    Meaning

    Impossible

  • word

    理科

    Meaning

    Science

  • word

    修理

    Meaning

    Repair

  • word

    心理

    Meaning

    Psychology

  • word

    管理

    Meaning

    Management

  • word

    処理

    Meaning

    Processing, Disposal

  • word

    理想

    Meaning

    Ideal

  • word

    論理

    Meaning

    Logic

  • word

    原理

    Meaning

    Principle

  • word

    生理

    Meaning

    Menstruation, Physiology

  • word

    代理

    Meaning

    Proxy

  • word

    合理

    Meaning

    Rationality

  • word

    義理

    Meaning

    Duty, Obligation

  • word

    合理的

    Meaning

    Rational

  • word

    整理

    Meaning

    Organize, Sort

  • word

    物理

    Meaning

    Physics

  • word

    理事

    Meaning

    Director

  • word

    倫理

    Meaning

    Ethics

  • word

    理念

    Meaning

    Philosophy

  • word

    真理

    Meaning

    Truth

  • word

    理性

    Meaning

    Reason

  • word

    理屈

    Meaning

    Logic, Reasoning

  • word

    総理

    Meaning

    Premier

  • word

    地理

    Meaning

    Geography

  • word

    理

    Meaning

    Reason

  • word

    調理

    Meaning

    Cooking

  • word

    理解

    Meaning

    Understanding

  • word

    論理的

    Meaning

    Logical

  • word

    無理矢理

    Meaning

    Forcibly

  • word

    理系

    Meaning

    Science

  • word

    総理大臣

    Meaning

    Prime Minister

Words Related to 理論 Through the Kanji 論

These 16 Words contain the Kanji 論 as well.

  • word

    論

    Meaning

    Theory

  • word

    論理

    Meaning

    Logic

  • word

    論文

    Meaning

    Paper, Thesis

  • word

    無論

    Meaning

    Of course, Naturally

  • word

    論ずる

    Meaning

    Discuss, Argue

  • word

    議論

    Meaning

    Discussion

  • word

    結論

    Meaning

    Conclusion

  • word

    言論

    Meaning

    Discussion, Speech

  • word

    評論

    Meaning

    Critique, Commentary

  • word

    世論

    Meaning

    Public opinion

  • word

    論じる

    Meaning

    Discuss

  • word

    反論

    Meaning

    Objection

  • word

    論理的

    Meaning

    Logical

  • word

    論争

    Meaning

    Dispute

  • word

    討論

    Meaning

    Debate

  • word

    弁論

    Meaning

    Debate

Learn the Word 理論

Let's make sure you fully understand this word.

What does 'Riron' (理論) mean?

'Riron' means 'Theory' .

To help you master this word, here's an interactive lesson where you'll practice its readings and meanings.