Salarymen picking up old newspapers out of bins like tramps searching for food, Salarymen reading pornography on the train ride home.
The annoying buzz of cicada waking me up on a scorching hot day.
Eating Oden when it's so cold that your fingers are numb. 
The latest electronic gadgets on the market advertised and for sale seemingly everywhere.
Big City Life.
Spending a large part of my day in a train or waiting for one.
Eating excellent rice everyday.
Eating fish most days.
Relaxing in a hot onsen. 
Watching J-drama on TV and actually understanding it. 
The smell of rice fields. 
Pachinko parlours.
Men smoking in front of me on busy narrow streets.
Streets with no pavements.
Streets with vending machines on every corner.
A temple or shrine everywhere I go. 
Very-Similar-To-Chinese-Yet-Different Kanji.
Engrish.
Seemingly ubiquitous super cute girls.

Japan.