Komano played for his local junior high school team. He was invited for trials from several clubs including Gamba Osaka, JEF United Ichihara, Sanfrecce Hiroshima and local high school powerhouse Hatsushiba Hashimoto. He decided to join Sanfrecce Hiroshima and entered Yoshida High School in Hiroshima.
He has been the first-choice right back for the club since 2001 when he is available. He suffered from several serious injuries and illnesses. He damaged the cruciate ligaments of his left knee in the match against Yokohama FC on 16 August 2003. While he was in hospital, he suffered from a venous thrombosis. Because of these, he was sidelined until April 2004. He broke his left collar bone in an Olympic game against Ghana in August 2004. In September of the same year, he also suffered from a uveitis problem that might have caused blindness.
Komano represented Japan at the 2004 Olympics. He made his full international debut for Japan on 3 August 2005 in an East Asian Cup match against China. He was a member of the Japan team for the 2006 FIFA World Cup finals as a backup for first-choice Akira Kaji. Because of Kaji's injury, Komano played in Japan's opening game against Australia. He was also a member for the 2007 AFC Asian Cup finals. He played all the Japan games except one for which he wasn't eligible due to suspension. Komano moved to Júbilo Iwata for the 2008 season after Hiroshima was relegated to J. League division 2.