Hirose sent the important information collected by the Finns to Tokyo and in turn received from the Kwangtung Army information gathered along the Manchurian-Soviet border. Thanks to this cooperation, the decryption of the codes of the Soviet ground force and the border guards progressed satisfactorily, and must have been of some use when the Finnish General Staff planned military operations against the Red Army.
This was actually discovered by Richard Sorge’s intelligence circle during WW2, causing the Soviets to overhaul their entire military encryption system. Funnily enough, the Soviets kept using the old system, for the simple act of tricking the Japanese into thinking they “uncovered” Soviet plans, as Japan would hand the fake intel over to Germany where it wreck havoc and confusion on German planning.
Richard Sorge, the hero
The one of the many unsung heroes of the USSR.