In March 2018, Kanzaki finished the 76th Meijin Class C2 league (April 2017 – March 2018) with a record of 2 wins and 8 losses, earning a second consecutive demotion point which meant he was only one point away from automatic demotion to "Free Class" play.[2] As a result, he declared his intention to the Japan Shogi Association to become a Free Class player as of April 2018 rather than risk automatic demotion.[3][4]
On August 2, 2022, Kanzaki defeated Tomoki Yokoyama 4-dan in 64th Ōi tournament play to become the 58th shogi professional to win 600 games.[5]
Kanzaki received the JSA's "25 Years Service Award" in recognition of being an active professional for twenty-five years in 2011. In addition, he received the JSA's "Shogi Honor Award" in August 2022 for winning 600 games as a professional.[7]