At the 1998 World Junior Championship, Jokinen tied with American Jeff Farkas as the tournament's scoring leader with ten points and helped Finland win the gold medal on home soil. He was named a tournament all-star at centre, and was given the Directorate Award as top forward. He then won a silver medal at the 1998 World Championship. Another silver followed in 1999 and bronze medals in 2000, 2006 and 2008. In total, Jokinen has appeared in ten World Championships for Finland, scoring 41 points in 82 games.