It's an Eastern Western. And not with sabers, but with guns about the 17-20 years of the 20th century (refers to the Revolution in Russia).
There are different people, many factions (Japanese military, gangsters, local people) who learned about the treasure map and now everyone rushed to chase it.
Among them is the Immortal Sugimotov, a former military man who received his nickname for luck on the battlefield. He met an Ainka girl (the indigenous people of Sakhalin and Hokaido) and for some reason began to help her.
Lots of shootings, twists and turns - in general, a cool adventure.
And since this is a Japanese lubricant, there will be a lot of madness. . .
But at the same time, the culture of the Ainu people is perfectly conveyed here - you can see at least for the sake of this.
Or Season 3 for Sakhalin, there's a funny version of the revolutionary movement in the Russian Empire.