However , he was only 13 - years - old .
However , he had poor health , and left domain affairs largely in the hands of senior retainers , who were forced to reduce taxation in 1771 due to peasant revolts .
However , he was only 13 - years - old and had poor health , and left domain affairs largely in the hands of senior retainers , who were forced to reduce taxation in 1771 due to peasant revolts .