Ham radio in Japan

My dad called me over to his radio a few moments ago as he picked up this guy from Japan!
I've seen photos of ham radio shops in Akihabara but I've never heard any Japanese on my dad's radio till today. At first I thought he was speaking Japanese but my dad pointed out he was actually talking about the specs of his radio (above) in English! Go figure.
This guy has some serious equipment and reaches a lot of people. Apparently his nickname is "active ken". haha
Hi QRZ profile:
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No radio Otaku here I take it...
My father has also a Ham Radio license. Now and then he shows me his new equipment and I help him set it up to his laptop. Really cool stuff. That's a nice Radio.