Toshihiro 'Toshi' Arai (新井敏弘, Arai Toshihiro, born December 25, 1966) is a Japanese rally driver and team owner.

He made his debut in 1987 and drove for the Subaru World Rally Team in the Group N World Rally Championship from 1997 to 2000 and 2002–2003, and in the Group A Championship in 2000–2001.

In 2004 he established his own team, Subaru Team Arai, and won the FIA Production Car World Rally Championship for Drivers in 2005 and 2007 driving a Subaru Impreza WRX STI, which made him the first Japanese FIA world champion.

[2] He scored class victories in Turkey, Japan and Australia on his way to the title.

He was also the winner of the short-lived FIA Teams' Cup in 2000.