Under the Tang Dynasty, the system of larger ryo, which was three times larger than ryo, was established that larger ryo weighed 11 sen and 4 bu, which was three times as much as 3 sen and 8 bu.
唐代にこれの3倍を大両とする制度ができたが、大両は3銭8分の3倍（11銭4分）である。