To American fans, Shinzaki is perhaps most known for his stint in the United States–based World Wrestling Federation (WWF) from 1994 to 1996 under the ring name Hakushi (白紙).

Under this persona, Shinzaki wrestled in a slow, meditated style, and constantly performed prayers in the ring before every movement.

He also came to the arenas in full pilgrimage garments, including white robes and suge-kasa hats, and carried a shakujo staff and a kongo-zue.

Initially a heel, his first few matches were highlighted by victories over jobbers which included future star Matt Hardy and midcarders like Aldo Montoya, and 1-2-3 Kid.

Horowitz, who lost for years on WWF programming to get over new talent, surprisingly used his three-quarter nelson to secure a victory over Skip.

He made a single night appearance with New Japan Pro-Wrestling at "Battle Formation" on April 29, 1996, where he wrestled The Great Muta.

One year later on January 4's Wrestling World In Tokyo Dome 1997, he faced and defeated Heisei Ishingun member Michiyoshi Ohara, who had a similar gimmick to his, and mimicked everything Shinzaki did.

Shinzaki then kept a feud against Mitsuharu Misawa's Untouchables faction, but his appearances in AJPW became more sparse until ceasing in favour of Michinoku Pro in 2002.

In 2001, still as an AJPW representative, Shinzaki made a surprise appearance in New Japan Pro-Wrestling, wearing a white mask and causing Kazunari Murakami's defeat to Keiji Mutoh.

Jinsei then unmasked, and Mutoh introduced him as the new member of his personal faction Bad Ass Translate Trading.

Shinzaki has been the president of Michinoku Pro Wrestling company since 2003 as a result of Sasuke dedicating more of his time to his political career as a member of the Iwate Prefectural (state) Assembly.

On April 15, 2011, Shinzaki returned to the United States to wrestle for Chikara in the 2011 King of Trios tournament, where he would represent Michinoku Pro with Dick Togo and the Great Sasuke.

[8] The following day, Team Michinoku Pro defeated Jigsaw, Manami Toyota and Mike Quackenbush to advance to the semifinals of the tournament.