Reason
"Reason" in Japanese
原因
gen'in
(that which causes: a cause)
思慮
shiryo
((the capacity of the human mind for) rational thinking)
理性
risei
((the capacity of the human mind for) rational thinking)
理由
riyū
(that which causes: a cause)
理由
riyū
(motive for an action or determination)
理致
richi
((the capacity of the human mind for) rational thinking)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.