 Complete the following phrase:  Born in the city of Ojiya in the Niigata Prefecture, Isa found biathlon after graduating high school and joining the military. Isa debuted in the World Cup in first round of the 200001 World Cup in Antholz-Anterselva, Italy. That season Isa made his debut at the World Championships at the World Championships in Pokljuka. He also participated in all World Championships from 2003 to 2009, and then all three World Championships from 