He is the current trainer of the Turkmenistan National Judo team.
[1] Tokuno was born in Iyo, Ehime,[2] and began judo at the age of 6.
[2] He entered the Kanagawa Prefectural Police after graduating from Tokai University.
He was also known as a rival of three-time Olympic champion Tadahiro Nomura for long time.
[3] As of 2010, Tokuno coaches judo at Komatsu Limited and among his students are Mika Sugimoto, Ayumi Tanimoto, and Mina Watanabe.