The three main ones are Hepburn romanization, Kunrei-shiki Rōmaji (ISO 3602), and Nihon-shiki Rōmaji (ISO 3602 Strict).
Dagiti tallo a kangrunaan ket ti romanisasion ti Hepburn, Kunrei-shiki Rōmaji (ISO 3602), ken Nihon-shiki Rōmaji (ISO 3602 Strict).