[Jedi Master Pikachu]

Bluntly put, you seem to know less about the Japan/Russia historical relationship than people know that their is oil in the region. For Russia, a large part is probably oil, though some of it is pride. The Japanese have dead relatives buried on some of the islands, and pride is also a factor for them. The lands/region has been in dispute since the end of the second World War, before oil exploration in the region.

[Jedi Master Pikachu]

their there....