Opens their doors early April, with current first availability April 7 (so likely just a little late for last minute Sakura reservations). Interesting concept, as rates are fixed year-round regardless of weekday / weekend / holiday. 9 different room types, starting at 14,900, with most at 27,900 or above. Given the pricing, could be a good option for people booking well in advance of arrival, particularly during holidays.

Room designs are somewhat minimalist, with many of the furnishings fitted right from their stores.

https://hotel.muji.com/ginza/en/

It appears that rates are currently available 3 months out to the day, and you can see a rate calendar if you click on Reservations and then Details for any specific room type. https://hotel.muji.com/ginza/en/rooms/