Osamu
Meaningoften disciplined, governing · Japanese
Osamu is a Japanese boy name often meaning “disciplined, governing”. In Japan, parents often choose a name as much for the kanji characters behind it as for its sound, so the same name can carry several shades of meaning. A meaning like this gives a child something to grow into, and a good story to tell when someone asks about their name. It sounds flowing and melodic, it's easy to spell and quick to call across a playground, and it pairs well with a short middle name.
Did you know?
- Hidden namesLook closely: Osamu has the name Sam hiding inside it.
- GenerationOsamu peaked in 1925, which makes it a Greatest Generation name, think great-grandparents.
- HistoryOsamu first shows up in US birth records in 1920, the first year at least 5 babies got it. It has been in use for 105 years since.
Save adds it to your list. Vote moves it up the top voted names.
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
About the name Osamu
Osamu is a boy name of Japanese origin meaning “often disciplined, governing”. With 3 syllables it has a flowing, lyrical sound, so a short middle name balances it nicely. It was most fashionable in the 1920s, which gives it a vintage, grandparent-chic charm. It's rarely heard today, so it stands out while still being a real, established name.
Origin:Japanese names
More Japanese boy names
- Unisex name: Asa · healer
- Unisex name: Rio · river
- Unisex name: Akari · light, brightness
- Boy name: Kenzo · often healthy third son
- Boy name: Kenji · often strong second son
- Unisex name: Ren · often lotus
- Unisex name: Zen · meditation
- Unisex name: Mars · god of war
Questions about the name Osamu
What does the name Osamu mean?
Osamu means “often disciplined, governing” and comes from Japanese.
What is the origin of the name Osamu?
Osamu is Japanese in origin. Other Japanese names to consider are Asa (“healer”), Rio (“river”), Akari (“light, brightness”) and Kenzo (“often healthy third son”).
Is Osamu a boy or girl name?
Osamu is a boy name.
How popular is the name Osamu?
Osamu is rare: fewer than 5 US boys got it in 2025, and it was last given to 5 or more in 1997. It peaked at #2,588 in 1925, so it's a name with history that few kids share today.
What should I know before naming my baby Osamu?
Osamu is a Japanese boy name often meaning “disciplined, governing”. In Japan, parents often choose a name as much for the kanji characters behind it as for its sound, so the same name can carry several shades of meaning. A meaning like this gives a child something to grow into, and a good story to tell when someone asks about their name. It sounds flowing and melodic, it's easy to spell and quick to call across a playground, and it pairs well with a short middle name. Say it out loud with your last name and any middle names you're considering, and check the initials it makes.