Considering Neighbors in Japan
The tight space living means that sound travels easily. If you want to listen to music loudly, you should use headphones. Avoid wearing shoes inside, because it’s just weird to Japanese people, and the noises from walking with shoe on maybe heard downstairs. Parties are best to beheld during the day, if held at all. Also, hard to do with COVID. There have been reports of downstairs neighbors banging on the ceiling to complain about what might be considered minor noises, like a kid accidentally dropping a toy on the floor.
Keeping the sound levels as low as possible is a great way to consider the neighbors.