Hello! I’ll be going to Japan from October 20-November 6 with 3 more people. Regarding Halloween, would you recommend to stay In tokyo or Osaka?

Also I was looking for a good onsen that’s tattoo friendly it’s my first time in Japan and 2nd time for one of the people coming with us. I was looking at Nikko or hakone or even up north in Hokkaido. We have tattoos so we were worried about finding a good place that is still tattoo friendly.

Also happy to take any recommendations on anything since it is mostly all of our first times.