Shooto promoter Sustain has nearly completed its May 3 lineup at JCB Hall in Tokyo. Four fights have been added to the card, including opponents for Shooto stars Rumina Sato (Pictures) and "Lion Takeshi" Takeshi Inoue (Pictures).

In a 143-pound contest, Sato will take on recently deposed Shooto world champion Akitoshi Tamura (Pictures).

One of 2007's most unlikely breakout fighters, Tamura lost the Shooto world championship to equally unlikely challenger Hideki Kadowaki (Pictures) via majority decision in a lackluster affair last month.

Curiously, Sato's last action came in September, when he was upset by the aforementioned Kadowaki, who choked out the iconic shootor in the first round.

Also in 143-pound action, Inoue, another former Shooto world champion, will take on an unexpected opponent in Trenell "Savant" Young. Inoue has won both of his bouts since losing his title to Akitoshi Tamura (Pictures) last May, submitting Dutchman Marc Duncan (Pictures) in July before hammering Katsuya Toida (Pictures) to a unanimous decision last November. Young hasn't fought since dropping a unanimous decision to Deividas Taurosevicius (Pictures) last August.

Despite his resume, Young has been granted only a Class B Shooto license, casting his bout with Inoue as a two-round affair.

In other Class B action, Sustain has announced a 143-pound contest between Hayate Usui (Pictures) and Sakae Kasuya (Pictures), and a 115-pound bout between Noboru Tahara (Pictures) and Katsuya Murofushi (Pictures).

The promotion also announced the official participation of up-and-coming lightweights Yusuke Endo (Pictures) and Shinji Sasaki (Pictures).

Sherdog.com previously reported that either Endo or Sasaki would potentially face Frenchman Bendy Casimir (Pictures) pending Casimir's April 19 bout in England with Andre Winner (Pictures). Casimir defeated Winner by majority decision, which clears the way for a May 3 fight in Japan notwithstanding an injury coming out of his bout with Winner.