About the name Osamu
Osamu belongs to the Japanese tradition. Its roots are documented, even though its precise meaning is not recorded in the standard references — an honest gap we prefer to a confident guess.
In the United States, Osamu first appears in Social Security records in 1920. It climbed to its best-ever rank of #2707 in 1925, and in 2024 0 babies received the name — 94 in total since 1880. Those are the official counts, not estimates.