How do you say truth in Japanese?
— 真理

Attributes for truth in Japanese
true真実 (しんじつの, shinjitsu-no); 本当 (ほんとうな, hontō-na)
Derivative terms for truth in Japanese
true真実 (しんじつの, shinjitsu-no); 本当 (ほんとうな, hontō-na)