Japan takes Sakhalin and Kuriles During the Russian Revolution

What if during the anarchy of the Russian Revolution, Japan decided to take the rest of Karafuto and the Chishima Archipelago? I believe that the Anglo-American reaction would either be tolerating the expansion (possibly UK reaction) or pressure Japan economically (definitely US and possibly UK reaction). Could this be enough to keep Japan out of the Siberian Intervention?
 
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