If you can't find any work

You’ve tried everything and nothing’s working for you? You might just be in the wrong place at the wrong time. Tokyo has the largest number of jobs, but also the largest number of foreigners, so the competition is tough. There’s also a seasonal factor; for example, you’ll find very few job offers in Hokkaido in the summer, but plenty in winter thanks to ski resort positions.

If that’s your case, consider broadening your horizons by possibly changing cities.

Alternatively, try volunteering via WWOOFing, HelpX, or Workaway. These platforms (found almost everywhere in the world) let you work without pay in exchange for room and board. You won’t earn money, but you’ll spend very little too. It’s a chance to have a truly authentic experience in Japan, off the beaten tourist path.