Ishizawa was an outstanding Amateur wrestler from Waseda University before being scouted and initiated into the New Japan Pro-Wrestling (NJPW) promotion on September 21, 1992, wrestling against Tiger Mask.

After defeating Yuji Nagata to win the 1996 Young Lion Cup, he left on a learning excursion to Austria's CWA promotion, where he disguised himself under a mask and called himself Kendo Kashin.

That same month he returned to New Japan as Kendo Kashin and won the IWGP Junior Heavyweight Title for the second time by defeating Masayuki Naruse.

On April 2, 2005, Kashin competed under a mask as Dragon Soldier B in Ring of Honor's Best of the American Super Juniors Tournament.

After a long hiatus from wrestling, Kashin returned on December 20, 2007, at the Inoki Genome Federation's show in Tokyo and faced off against Kurt Angle for IGF's version of the IWGP World Heavyweight Championship in a losing effort.

Kashin faced 2 Cold Scorpio for the WPW title in a losing effort at Cheltenham Town Hall on February 18, 2018, at SuperClash.