Starting in the late Nineteenth century, Japan adopted the western custom of putting the given name first and family name last when writing/saying their names in English.
It’s only in the last few years that a movement has started to change it so that the order will match between Japanese and English.
Dunlaing t1_jd8zowu wrote
Reply to ELI5: Why do English speakers switch Japanese names to have the family name last, but not Korean names? by JorWat
Starting in the late Nineteenth century, Japan adopted the western custom of putting the given name first and family name last when writing/saying their names in English.
It’s only in the last few years that a movement has started to change it so that the order will match between Japanese and English.