As sdemory posited, "statistics are bullshit and easily manipulated." I definitely felt less generally safe in Yokohama than I did in ANY area of Osaka. Hell, I've been through the sketchy areas in downtown Osaka, and I don't feel threatened. Sure, there's a bunch of that which deals directly with me being a Big White Foreigner, but I'm saying that even with that "advantage" I felt less safe in Yokohama and Roppongi.