Japan 
triathleteBirthdays by Profession
- Association football player (461)
- Actor (255)
- Baseball player (131)
- Seiyū (129)
- Singer (125)
- Politician (121)
- Tarento (58)
- Writer (58)
- Samurai (56)
- Mangaka (53)
- Model (52)
- Screenwriter (44)
- Film director (42)
- Composer (41)
- Rikishi (39)
- Athletics competitor (37)
- Professional wrestler (35)
- Novelist (34)
- Swimmer (32)
- Fashion model (31)
Birthdays by Region
- Tokyo (335)
- Ōsaka Prefecture (131)
- Kanagawa Prefecture (129)
- Hokkaidō Prefecture (85)
- Kantō region (78)
- Hyōgo Prefecture (75)
- Aichi Prefecture (71)
- Fukuoka Prefecture (71)
- Chiba Prefecture (71)
- Shizuoka Prefecture (66)
- Kyōto Prefecture (57)
- Hiroshima Prefecture (42)
- Mie Prefecture (32)
- Kumamoto Prefecture (28)
- Ishikawa Prefecture (26)
- Ibaraki Prefecture (25)
- Niigata Prefecture (25)
- Yamaguchi Prefecture (24)
- Okinawa Prefecture (24)
- Nagasaki Prefecture (21)
Birthdays by Place
- Tokyo (232)
- Kanagawa Prefecture (60)
- Ōsaka (59)
- Saitama Prefecture (42)
- Yokohama (40)
- Ōsaka Prefecture (38)
- Hokkaidō (32)
- Chiba Prefecture (32)
- Kyoto (29)
- Hyōgo Prefecture (29)
- Fukuoka Prefecture (26)
- Aichi Prefecture (22)
- Fukuoka (19)
- Shizuoka (19)
- Sapporo (17)
- Hiroshima (16)
- Kōbe (16)
- Shizuoka Prefecture (16)
- Nagoya (15)
- Kagoshima Prefecture (15)
