Sichuan pepper is known in Chinese as huÄ jiÄ o ( è æ ' ; literally `` flower pepper '' ) ; a lesser-used name is shÄ njiÄ o ( å æ ' ; literally `` mountain pepper '' ( not to be confused with Tasmanian mountain pepper ) . Sichuan pepper is known in Chinese as huÄ jiÄ o ( è æ ' ; literally `` flower pepper '' ) . A lesser-used name is shÄ njiÄ o ( å æ ' ; literally `` mountain pepper '' ; not to be confused with Tasmanian mountain pepper ) , which is also the root of the Japanese .