The midfielder credited his former Crystal Palace and Eintracht Frankfurt manager for helping him adapt to a deeper role, which he says has revitalised his international career.
In his 50th appearance for Japan, Kamada became the hero in a 2-2 draw, inadvertently diverting a header past Bart Verbruggen in the 88th minute to rescue a point.
Speaking to Reuters, the 29-year-old reflected on the result and his redemption after a difficult campaign at the previous World Cup in Qatar.
"That was just lucky but for me it's a dream come true," Kamada said.
"A goal is a goal and I could help the team. At the last World Cup I didn't perform well, so I'm really happy to help the team.
"I was always thinking that I really wanted to play as a No. 6 but the manager said I need to learn more and be more defensive.
“Oliver Glasner gave me the opportunity to play as a No. 6 and I've learned a lot about defending. Now I think we have many fast players so that's why I play at No. 6.
“The other 10 players make runs deep and do something different. I was always thinking I could play as a No. 6, since I was 18."