I was in error above.
Japan has to attack an original Russian territory (“Red Territory”) to break the treaty and allow for the Russian INF to be placed. Likewise, Russia only breaks the treaty if they attack an original Japan territory (“Orange Territory”).
Does not make sense from a logical viewpoint… Russia and Japan forces are free to combat each other in China, Sinkiang, etc., but that apparently does not count…
UNLESS you read “red territory” as any territory under Russian (red) control and “orange territory” as any territory under Japan control…