Japan 
Japanese swimming OlympianBirthdays by Profession
- Association football player (14)
- Actor (9)
- Seiyū (8)
- Baseball player (5)
- Singer (4)
- Swimmer (4)
- Politician (4)
- Model (3)
- Mangaka (3)
- Mixed martial artist (3)
- Fashion model (3)
- Amateur wrestler (3)
- Writer (3)
- Professional wrestler (3)
- Novelist (2)
- Judoka (2)
- Screenwriter (2)
- Samurai (2)
- Rikishi (2)
- Volleyball player (1)
Birthdays by Region
- Tokyo (8)
- Kanagawa Prefecture (8)
- Ōsaka Prefecture (5)
- Kyōto Prefecture (4)
- Aichi Prefecture (4)
- Fukuoka Prefecture (4)
- Aomori Prefecture (3)
- Kantō region (3)
- Hiroshima Prefecture (3)
- Ibaraki Prefecture (2)
- Mie Prefecture (2)
- Shizuoka Prefecture (2)
- Hyōgo Prefecture (2)
- Nagasaki Prefecture (2)
- Nara Prefecture (2)
- Gunma Prefecture (2)
- Wakayama Prefecture (1)
- Gifu Prefecture (1)
- Tochigi Prefecture (1)
- Chiba Prefecture (1)
Birthdays by Place
- Yokohama (4)
- Kanagawa Prefecture (4)
- Tokyo (4)
- Fukuoka (3)
- Ōsaka Prefecture (3)
- Kyoto (2)
- Adachi-ku (2)
- Midori-ku (1)
- Saitama Prefecture (1)
- Ibaraki Prefecture (1)
- Hiroshima Prefecture (1)
- Nagasaki Prefecture (1)
- Toyota (1)
- Sasebo (1)
- Toyama Prefecture (1)
- Ichinomiya, Hyōgo (1)
- Chatan (1)
- Edo Castle (1)
- Kyōto (1)
- Fukuoka Prefecture (1)
