Hirose was awarded 40 caps for Japan; he made his debut in a 26–11 1995 Rugby World Cup qualifier win over South Korea, October 29, 1994, in Kuala Lumpur, Malaysia.
In his career, Hirose scored 5 tries, 77 conversions, 79 penalties and 2 drop goals, reaching a national record of 422 points in aggregate.
He played in a single game at the 1995 Rugby World Cup, the infamous 145–17 defeat to New Zealand.
In the 44–17 win over Tonga, at 8 May 1999, in Tokyo, during the Pacific Rim Championship, he kicked a then record of 9 penalties from 9 attempts.
Hirose again played only once at the 2003 Rugby World Cup, in a 32–11 defeat to Scotland, at 12 October 2003, scoring 2 penalties.