In February 1581, he was awarded half of the Ecchu Province formally and became Shugo (military commander and administrator of province) due to the downfall of Nagazumi and upgraded the Toyama-jo Castle largely to use it as the headquarters.
天正9年（1581年）2月、正式に越中半国を与えられ、翌年の長住失脚により一国守護となり、富山城に大規模な改修を加えて居城とした。