TOKYO — Japan’s massive security apparatus for the upcoming Tokyo Olympics is raising complaints that the nation will look more like authoritarian North Korea or China than one of the world’s most powerful, vibrant democracies. The worry for many Japanese, however, isn’t too much Big Brother. It’s that all the increased precautions won’t be nearly enough to stop the estimated 85,000 athletes, officials, journalists and other workers coming into Japan from introducing fast-spreading coronavirus variants to a largely unvaccinated population struggling with mounting cases. So far, the majority of athletes and others are exempted from typical quarantine requirements. The Japanese press is filled with reports of Olympic-related people testing positive, breaking mask rules and drinking in public.