|Date of birth||May 22, 1987|
|Place of birth||Kobe, Hyōgo, Japan|
|Height||1.66 m (5 ft 5 in)|
|Weight||72 kg (11 st 5 lb)|
|School||Hotoku Gakuen High School|
|Rugby union career|
Hiwasa was a member of the Japan team at the 2011 Rugby World Cup, and played four matches for the Brave Blossoms.
- "Atsushi Hiwasa - Japan". ESPNscrum. ESPN Inc. Retrieved 14 November 2013.
- "RWC 2011 - Japan - Atsushi Hiwasa". RWC 2011. International Rugby Board. Archived from the original on 7 April 2014. Retrieved 14 November 2013.
- "Archived copy" メンバー 日和佐 篤 (in Japanese). Suntory Sungoliath. Archived from the original on 2013-06-12. Retrieved 14 November 2013.CS1 maint: archived copy as title (link)
- Top League Profile, in Japanese
- Suntory Sungoliath Profile, in Japanese
- Player Statistics from itsrugby.co.uk