Sichuan pepper is widely used in the cuisine of Sichuan , China , from which it takes its name , as well as Tibetan , Bhutani , and Japanese cuisines , among others . It is widely used in the cuisine of Sichuan , China , from which it takes its name , as well as Tibetan , Bhutanese , Nepalese , Japanese , Konkani , and Toba Batak cuisines , among others .