Atsushi Hiwasa

 (born 22 May 1987 in Hyogo, Japan) is a Japanese rugby union player. Hiwasa has played 28 international matches for the Japan national rugby union team.
Hiwasa was a member of the Japan team at the 2011 Rugby World Cup, and played four matches for the Brave Blossoms.
Hiwasa currently plays for Top League team Suntory Sungoliath. He commenced playing for the club in 2010.