Born in 1972 in Fukuoka Prefecture. He is a former president of livedoor Co.,Ltd. While enrolled in Tokyo University, he founded Livin' on the EDGE Co., Ltd., the predecessor of livedoor Co.,Ltd. He has changed the company name to livedoor Co.,Ltd. in 2004, and has announced that livedoor acquired the old Kintetsu Buffaloes, a Japanese baseball team, which catapulted Mr. Horie into the limelight