Actually, you don't need to bring too many things.

Take some clothes, military training is in that basketball court. ...

You can bring some sunscreen or something, antidiarrheal drugs are recommended, and you can use them in emergencies at ordinary times.

You can bring something to eat, but there is a supermarket, two smaller than the unified ginza outside, and there is nothing to buy. ...

There are many insects in the Happy Willow ... You should bring some insect repellent, such as toilet water. ...

There should be no need to bring anything else specially. ...