Japan is one of the World's most advanced democracies. But is it also a haven for foreign spies? A New York Times report says Russian intelligence has long taken advantage of Tokyo's weak counter-espionage laws. Now, the government of PM Sanae Takaichi is promising a major security overhaul. Why has Japan struggled to deal with spies for decades, and what is it doing to change that? We explain in this special episode of Faultlines.