What would be some recommended things to take with me to Japan?

Question:

Like what are some things they may not have in japan that they have in the U.S.?

Answer:

Bringing electronics? Does the power cord have 3 prongs? Bring a shape changing outlet plug to convert it to just 2 prongs as Japanese outlets have only 2. This would be ideal for things like laptops. Don't worry about electrical currents, voltages are pretty much the same as the USA (close enough that no harm will come to your electronic device, and most laptops are designed to take a charge from anywhere in the world these days anyway).