It is traditionally given to the eighth son.
Γ Botan This name refers to a flower, the peony.
Γ Hiroto This name means big.
A namesake is Emperor Hirohito, who ruled over the Japanese Empire from 1926 to 1947, and immediately afterward was the emperor of the State of Japan all the way to 1989.
So, if you are not so keen on the meanings, forget it.
Γ Japanese Boy Names And Meanings M-Y Here are some unique Japanese names to give your wise, healthy baby boy.