What do you mean by not cleaning during your stay in Japanese hotels?

Don't clean your room while you are staying in the hotel.

In order to save costs, many hotels in Japan will provide "clean-free" and "green" services. According to the different business strategies of different hotels, some of this "no-cleaning" service will allow guests to choose by themselves, while others will default to "no-cleaning" unless the guests request it.

Of course, the "no-cleaning" service reduces the cost of the hotel, and natural housing will be cheaper. Some hotels will directly reduce the room rate, and some hotels will provide discounts, points or small gifts.