To be honest, I believe it is safer to bring the DSLR than to bring a PNS. The article look more like a yankee first time travel to Asia and it is his own personal feeling and opinion to scare of catching attention.
To be hoestly with you, I was in Japan last year in Osaka and Tokyo. I was with my family, my wife and 3 kid. We were travelling in the train when my son has got some stomach problem and guess what. We got off the train without my lowepro bag! I only realized when my wife asked where my bag was, when we were taking our son towards the WC, the train was long gone. I had to go to the train master office, it was like a chicken and a duck trying to communicate, and the only thing I could do then was to file a lost and found. To cut the story short, I got the bag returned to me without anything lost the next day! The lost and found Office was speaking in some broken English, smiling, saying I could only get the stuff back in Japan... What was in side the back? A 1dsmk3, 70-200mmf4IS, 24-105mmf4, ex580II. And a Nikon 24mm PC lens with adaptor to fit Canon body(I only realized the lens with adaptor could only shoot at max apeture in Japan...)
The photographic opportunity in Japan, the lighting, the blue sky, You have to be there to see it and appreciate. You will regret if you don't bring your DSLR to Japan. Trust me.