| Roles | Competed in Olympic Games |
|---|---|
| Sex | Female |
| Full name | Hatsuko•Morioka (-Kato) |
| Used name | Hatsuko•Morioka |
| Original name | 守岡•初子 |
| Other names | 加藤 初子 |
| Born | 22 June 1915 in Katsuragi, Wakayama (JPN) |
| Affiliations | Myoji Elementary School, Wakayama (JPN) / Ibaraki Junior High School, Ibaraki (JPN) |
| NOC |  Japan |
Hatsuko Morioka was a five-time Japanese champion in the 400 m freestyle (1931-33, 1935-36) but also excelled in the backstroke. After retiring from competitive sports, she joined Nippon Life Insurance Co. and married in 1940.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1932 Summer Olympics | Swimming (Aquatics) | JPN |
Hatsuko Morioka | |||
| 400 metres Freestyle, Women (Olympic) | 11 | |||||
| 4 × 100 metres Freestyle Relay, Women (Olympic) | Japan | 5 | ||||
| 1936 Summer Olympics | Swimming (Aquatics) | JPN |
Hatsuko Morioka | |||
| 400 metres Freestyle, Women (Olympic) | 11 | |||||
| 4 × 100 metres Freestyle Relay, Women (Olympic) | Japan | 8 |
