Yonemitsu, a silver medallist at the World Championships last year, won the first period 1-0 and displayed his dominance in the second by lifting Sushil and putting him down on the mat. The move earned him three points and he won the period 4-1 and thereby the gold.
En route to the final, Sushil edged out Tanatarov 3-1 in a thrilling semi-final.
Tanatarov seemed the likely winner during the third and final period before Sushil fought back through grit and experience.
With the Kazakh leading 3-0, Sushil came up with brilliant moves to leave Tanatarov reeling on the mat. The contest ended with the Indian winning the period 6-3 and his opponent bleeding from the right ear.
In Image: Tatsuhiro Yonemitsu of Japan celebrates after defeating Sushil Kumar of India, right, in the 66-kg freestyle wrestling gold medal match