How do you say happiness in Japanese?
— 幸福 (こうふく, kōfuku); 幸せ (しあわせ, shiawasé); 愉快 (ゆかい, yukai); 幸福

Generic synonyms for happiness in Japanese
spirit精神
Attributes for happiness in Japanese
happy幸せ (しあわせな, shiawase-na); 幸福 (こうふくな, kōfuku-na)
Derivative terms for happiness in Japanese
happy幸せ (しあわせな, shiawase-na); 幸福 (こうふくな, kōfuku-na)