Japanese Idioms, Phrases & Proverbs

Yojijukugo (4-Character Idioms)

精励恪勤 せいれいかっきん seireikakkin
恪勤精励 かっきんせいれい kakkinseirei
刻苦精励 こっくせいれい kokkuseirei
精励刻苦 せいれいこっく seireikokku