Tawaraya 【俵箭】2 The Japanese surnames etymology dictionary.
Toyama-ken · Aichi-ken · Toukyou-to . A variant of 土山 . Toyama-ken Toyama-shi Meiji New surname by priest of Shinzoji in Shinjong Shrine in lotusachi. Toyama-ken Takaoka-shi Toyama-ken Takaoka-shi tells Tsuchiyama surname who got permission called from Mr. Tsuchiyama (Doiyama) who is a monk of Shodoji temple of Jodo Shinshu in Fushiki-kokubu to change soil to "degree". The mountain of the temple is also a mountain. 土山 reference.