Getting another tourist visa?

Hello! Im from the United States and am planning on going to Japan this year! Im very excited and interested in Japan and would like to be there for a decent amount of time. I believe I would only be able to get a tourist visa because I don't plan on being a student or working in Japan. However a tourist visa is only valid for up to 90 days and ideally I'd like to travel in Japan longer than that. My question is if its doable for me to go to Japan for the full 90 days, then catch a cheap flight to a neighboring country and stay there for around a month, then go back to Japan with a new tourist visa? I plan on asking this question to the Japan embassy but I figured it'd be worth it to ask here first. Any info is appreciated, thank you very much!

Yes you can.

Most just fly to korea and return the next day.

Wow you really can return just the next day? I was definitely thinking of going to Korea for the in-between period

Going to Korea and entering Japan again with Temporary Visitor status is possible, but not guaranteed. Be ready to show proof of traveling funds for the extended period of time.

Going to Korea and entering Japan again with Temporary Visitor status is possible, but not guaranteed. Be ready to show proof of traveling funds for the extended period of time.

We entered Japan at the end of August for 88 days (we are from Australia and can get a ninety day visa).

The immigration officers quizzed us both about why we were staying so long, and asked about, though didn't ask for evidence of, a return ticket. They didn't ask any questions about money. Compared to previous trips (up to 25 days) when we walked straight through, we were asked many more questions and kept for longer.

There were no swinging lightbulbs involved, but I wouldn't assume, based on that experience, that you will be able to waltz in and out easily.

If you stay more than half the year (I think 182 or so days) overall you can run into tax problems as well.