Born in Hokkaido, Japan in 1977.
He found many kind of music like Punk, Indie Rock, Jungle, Hip Hop, Techno, etc. when he stayed in England (Manchester, Birmingham and London) for a couple of years in late 90's.
Then started Djing in 1999.

He organized many parties and events in Japan, with Hokkaido musicians such as OKI ("Ainu" music innovator), THA BLUE HERB (legendary Hip Hop crew), and so on.
He teamed up with a rapper "The best-kept secret of Japanese Hip Hop" Y to the ONE (1980-2011), and toured Japan.
He often went to Hardcore gigs in his hometown and got strong feeling from that local scene.

Then moved to Bangkok in 2009.
His party "GIANT SWING" is organized in Bangkok with DJ mAsa niwayama. That non-genre party invited various guests such as ALTZ, SINKICHI [bud ryukyu], DJ YAHMAN, DJ DOPPELGENGER, BLOWBOHEMIA a.k.a. Masumoto Kota, Nu-Doh [bud ryukyu], DJ ENDO [CONVERGE+], NKchan (Japan), Patrizio Cavaliere (UK), THE ELECTRIC DOG, SayakaStar (Germany), Dan Bi Mong [Digital Natives] (Switzerland / Vietnam) and DJ Dragon (Thailand).

Also resident of Bangkok's top Dubstep party "DUBWAY" with DJ Dragon [Homebass Communications], MC Sinamon, Jo Stitch [Jiving-Tribe], etc. We invited DJs & musicians such as PINCH [Tectonic Recordings], RSD a.k.a. Rob Smith [Smith & Mighty] (UK), SABRE [Metalheadz], GA-PI DUB KITCHEN a.k.a. Gap T-bone (Thailand) and MC ABU [original member of Homebass Communications] (Japan). Artworks have been made collaborating with artists like Thun "TRK" Puchpen, Alex Face (Thailand) and QOTAROO (Japan).

DJ HIROO mainly plays heavy and dope tunes like Dubstep, Breakbeats and Techno. But on the other hand, he sometimes creates relaxed mood in his Chillout set.

He owns his music label called "Oyamapan Sound" and its sub-label "WORLD DJ's".