I've been to Japan 5 times.. but never personally witness EXTREME weirdness. I seen some weird products/foods.. but not any of the people with banana dicks or pussu pillows or what ever the fuck. Normal weird stuff like anime freaks and water shooting toilets...
It is a different culture though. I'll say this, freaks come out at night and even at night, Japan is lively.
Japan is dope though!!! Alot of the girls dig an outsider as long as they make them feel good. Just dont end up another "American rape case".