Calm Seas Daimyō

He is the daimyō of the Land of Calm Seas.

Background
When the country was dealing with an epidemic, the daimyō used this as an opportunity to make a fortune by restricting medical care to only the highest payers, leaving most of the citizens unable to afford it. Later, the daimyō discovered a medical-nin, Aosa, developing a cheaper and more effective treatment for the population, and sent his elite assassins Kurobane and Jujumaru to eliminate him and his students while also securing their treatment variants.

Personality
He is greedy, and willing to sacrifice his own citizens for a profit.

New Era
After the Konoha genin managed to defeat the assassins sent by the daimyō and deliver Mozuku's medicine to Aosa, as he couldn't directly interfere with the daimyō's governance, Naruto instead decided to send medical-nin to act as aid relief for the Land of Calm Seas' citizens.