More things that are helpful in Japan

1) the trains will probably be the main method of transportation, so when you buy the paper ticket, it goes in the slot. You don't tap it on the blue circle. That's for a pasco.
2) traditional Japanese toilets are in the ground. For those toilets you need to squat.
3) bring a coin purse. A delegate didn't, so they ended up making a duct tape coin purse. Coins are with a lot, they can range from one cent, to five dollars.
4) especially in the towns (Ueda instead of Tokyo) there are mirrors around corners and sharp turns when you can't see past the turn
5) stop lights have the three circles on top like in America (red, yellow, green), but sometimes there are also lights underneath  those with arrows. Some arrows point forwards.
6) littering is a big no in Japan. Don't litter, just don't do it. There isn't litter in Japan. Even gum, if you buy a cup of gum, they'll give you paper to put your uses gum.
7) in the towns you'll see lot's of people who hang their clothes outside. They use the sun and sir instead of a dryer
8) crosswalks may play a sound when it's green and you can cross. In Ueda, some crosswalks play music
9) Daiko, or the hyaku-en store. One hundred yen store. The equivalent to a dollar store in the United States but much better. It's has food, stationary, bags, hygiene stuff, etc.
10) the trains are quiet. If you're on a train and nobody's talking, it'd be in your best interest to also not talk, and if you need to, talk quietly.