in general, east asian cultures often dont operate with strict written rules. the unsaid rules, however, takes on a lot of weight and is mostly what guides the day to day. this is especially prominent in Japan. but i think the most optimal rule of thumb to operate under is respect. respect the culture, respect the objects, respect the knowledge, respect your home, yourself, your guests, etc.. this will lead to different results with different individuals but in the end, they may guide you to your optimal set up with what you have.