[chopstick]

There will be vending machines everywhere, vending all kinds of stuff. Try them.

If you like sushi, you probably shouldn't try the sushi in Japan, because then you'll be sad every time you have to eat sushi outside of Japan. The quality is that different.

Go to a neighborhood noodleshop, and sluuuurp away. Great experience.

Go to a pachinko parlor and try your luck. They make great souvenirs, too.

The 100 Yen (dollar stores, basically) stores rule.

When you enter your first store, you are going to get yelled at. Don't worry, you didn't do anything wrong. They are yelling "Irrashaimase!" which means "welcome".

enjoy!