Early career; New Japan Pro-Wrestling and excursion (1976–1981)

Sayama debuted in New Japan Pro-Wrestling, against Shoji Kai (Kanji Kitazawa), a jobber known to have been the debut opponent for future stars (Rusher Kimura, Masa Saito, Osamu Kido, Tatsumi Fujinami, and Mitsuo Momota had debuted against him before). Sayama weighed only 160 pounds, which, even given his training, impaired him from getting a permanent spot on NJPW cards. So they sent him abroad, to England where wrestling as Sammy Lee he took on opponents such as Marc Rocco and Mick McManus as well as teaming with Big Daddy. He also had a stint in Mexico, where he wrestled under his real name. It was in Mexico where he started to grow not only in physical stature but also in prominence, winning the NWA World Middleweight Championship in EMLL.

Return to NJPW (1981–1983)

Universal Wrestling Federation (1984–1985)

Sayama was inactive from the ring for nearly a year, having founded the Tiger Gym and spending most of his time training with his protege Kazuo Yamazaki. Sayama resurfaced in the Japanese UWF in 1984. By then, All Japan Pro Wrestling had purchased the Tiger Mask name and gimmick and given it to Mitsuharu Misawa. As a result, Sayama initially made appearances for UWF as The Tiger (which was the same colors as Tiger Mask), then alternated between using his real name and the gimmick of Super Tiger (colored silver and purple). He initially supported the UWF concept and had several memorable matches against Akira Maeda and Yoshiaki Fujiwara. Sayama would soon disagree with Maeda over style ideology, which led to a shoot during a match between Sayama and Maeda in 1985, in which Maeda delivered some controversial kicks to Sayama's lower abdomen. Sayama claimed that he was kicked in the groin, resulting in Maeda being disqualified. Shortly after this, Sayama left UWF, amid recriminations from other UWF wrestlers who disliked him for his selfish leadership. With no key opponents for Maeda, the UWF collapsed and Maeda and the rest of the roster headed back to NJPW.

Retirement and Shooto (1985–1996)

Sayama then left professional wrestling altogether.

In 1985 he founded Shooto, one of the world's first mixed martial arts (MMA) promotions, finally realizing his dream of becoming a martial arts trainer. He taught the art of shooting to fighters like Yorinaga Nakamura, Yuki Nakai and Rumina Sato, among others. During this time Sayama hosted the Vale Tudo Japan event, leading to the introduction of Brazilian jiu-jitsu in Japan, which drove him to change the rules of Shooto to adapt them to the vale tudo. In 1996 he left Shooto due to disagreements with the board of directors, and was succeeded by Taro Wakayabayshi.

Return to wrestling and aftermath (1995–present)

In 1995, Sayama was offered to return to puroresu for a match against old mentor Antonio Inoki. As there was already a Tiger Mask on the scene (his disciple, Tiger Mask IV, who debuted with the mask), Sayama used the name and gimmick Tiger King, using a gold-colored outfit. Inoki ended up winning the match.

In subsequent years, he (using the Original [Shodai] Tiger Mask identity), competing sporadically in various independent promotions, often in legends matches and teams with his younger disciple. In 1998, he was invited by Inoki to be a part of the board of his new venture, Universal Fighting-Arts Organization. He did, but left a year later to form Seikendo.

In 1999, attempting to return to the world of martial arts and to create something similar to Shooto, he created a martial art named Seikendo. It was a hybrid martial art similar to Shooto and MMA, but more akin to a traditional martial art—with focus on etiquette and ceremonials based on traditional Japanese imagery and ideals and spiritual and mental development—and focused on self-defense: Seikendokas would wear keikogis to simulate clothing, had rules that based on the principle it had a concrete floor, with groundfighting that focused on ground-and-pound, with no submissions allowed, and fighting was in an octagonal ring without ropes.^[6][7] Sayama also created a professional promotion by the same name to promote his martial art (as he had done to Shooto), which ran for three years and had five events before closing down in 2003.^[8]

In 2005, he founded a new promotion called Real Japan Pro-Wrestling and started to promote his old Super Tiger gimmick. However, with a career spanning over 30 years in addition to being actively involved in martial arts aside from wrestling, have taken its toll, with Sayama being fodder in singles matches for current stars aiming to become legends, such as Shinjiro Otani and Triple Crown Heavyweight Champion Minoru Suzuki (the title was not on the line in their match).

He has also appeared in Tatsumi Fujinami's Dradition promotion, as well as Antonio Inoki's Inoki Genome Federation. Sayama is much heavier than he was in his younger days, and as a result, his style has changed; he focuses more on mat-based wrestling, though he still uses his trademark martial arts kicks.

Still training young wrestlers, Sayama endorsed a second Super Tiger, played by seikendoka and mixed martial artist Yuji Sakuragi. In 2010, Sayama picked Ikuhisa Minowa as the fifth Tiger Mask, but has not wrestled under the mask since.

At the March 20, 2015, Real Japan event, Sayama was defeated by All Japan wrestler Akebono following a splash from the former yokozuna. Afterwards, Sayama began experiencing chest pains, which forced him to pull out of subsequent matches. After multiple tests, it was determined that Sayama needed to undergo emergency heart surgery, which took place on May 22.^[9] Following the surgery, Sayama began suffering from angina, which forced him to pull out of Real Japan's 10th anniversary event on June 11.^[10] On June 5, Sayama held a press conference, stating that he was not thinking about retiring from professional wrestling despite his life being in danger prior to the catheter surgery.^[11] Sayama returned to the ring on June 23, 2016, battling Minowa-man to a draw,^[12] but has not been back since then.

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