Japan 
Japanese swimmerBirthdays by Profession
Birthdays by Region
- Tokyo (11)
- Chiba Prefecture (5)
- Kanagawa Prefecture (4)
- Kantō region (3)
- Fukuoka Prefecture (3)
- Shiga Prefecture (2)
- Niigata Prefecture (2)
- Shizuoka Prefecture (2)
- Tochigi Prefecture (2)
- Okayama Prefecture (2)
- Ōsaka Prefecture (2)
- Nagano Prefecture (1)
- Aomori Prefecture (1)
- Ibaraki Prefecture (1)
- Ishikawa Prefecture (1)
- Aichi Prefecture (1)
- Miyagi Prefecture (1)
- Okinawa Prefecture (1)
- Mie Prefecture (1)
- Hokkaidō Prefecture (1)
Birthdays by Place
- Tokyo (8)
- Fukuoka Prefecture (2)
- Okayama Prefecture (2)
- Ōtsu (2)
- Ōsaka (2)
- Gunma Prefecture (1)
- Iruma (1)
- Chiba (1)
- Hachinohe (1)
- Akita (1)
- Miyagi Prefecture (1)
- Yachiyo (1)
- Ichihara (1)
- Tochigi Prefecture (1)
- Shinshiro (1)
- Miyazaki Prefecture (1)
- Kashiwazaki (1)
- Numazu (1)
- Chiba Prefecture (1)
- Shikokuchūō (1)
