A popular player in Kolkata maidan, Katsumi owes much of his success to the Japanese U-17 coach, who will turn 50 next month.
Katsumi began his youth career at the Sanfrecce Hiroshima under the coaching of Moriyama and considers himself like a "father figure".
"He's like a father figure to me. It was really exciting to see him and the Japanese team here. I will come and support my country tomorrow. I'm 100 per cent confident of a Japanese victory," Katsumi , who will be seen in East Bengal colours this season, said.