A Tsukahara is a type of vault in artistic gymnastics named after Japanese gymnast Mitsuo Tsukahara, who performed the first Tsukahara vault in 1972). The Tsukahara can refer to a specific vault and a family of vaults in gymnastics). A Tsukahara vault consists of a half turn off the springboard onto the vault table, followed by a push backwards, usually into a back salto or layout). Any vault that has a handspring with 1/4 - 1/2 turn onto the vault table into a salto backwards is classified as a Tsukahara vault). Some variations on the Tsukahara vaults include the Kim, Tsukahara tucked or stretched with full twist (360°) off, Zamolodchikova, Tsukahara stretched with a 2/1 turn (720°) off, and Phelps, which is a half turn onto the vault table, followed by a half turn off and into a front layout).
There are several videos available online that show what a Tsukahara vault looks like, including tutorials on how to perform the vault. There are also drills available to help gymnasts improve their speed and widen their placement for the Tsukahara vault.