This island was declared a republic with the assistance of Jules Brunet in 1869.
This island was the site of a native rebellion over suspicion of poisoned wine that resulted in the execution of 37 conspirators. This island was also the site of Koshamain's Rebellion and Shakushain's Rebellion. A (*)  city on this island hosted the 1972 Winter Olympics. This island was declared a republic with the assistance of Jules Brunet in 1869. A strait separating this island from another was the site of a battle in which the  Petropavlovsk was sunk, and it is separated by the La Perouse Strait from a territory once known as Karafuto. i For ten points, name this island, site of several Ainu Rebellions and the city of Sapporo, as well as the basis for the Pokemon region of Sinnoh..
This island was the site of a native rebellion over suspicion of poisoned wine that resulted in the execution of 37 conspirators.
Hokkaido