TOKYO — A day after the Tokyo Olympics concluded, social media posts in Japan showed photos and videos of a man believed to be the International Olympic Committee’s president, Thomas Bach, strolling through Ginza, a popular shopping district of Tokyo. Those posts went viral. And not as kudos for helping finally pull off the Tokyo Games. Instead, many in Japan view Bachas complicit in pushingJapan to host the Games despite the public health risks and the financial toll on taxpayers.