Sengoku – Hideyoshi, yoyomonster. – Agonist 1.0, Crook, Antagonist, etc.

One of the top 1A players in Japan, Kazuki was the 2009 and 2010 Japan National runner-up in the 1A Division, and is a JYYF official judge. He is the older brother of Naoto Okada (2009, 2011 World Champion in 4A). When he's not playing yo-yo, he loves reading books and playing with his three kids.