Don't even think about it... BW in Japan was acquired and rebranded from a microhotel chain. The rooms are sooooooooooooooo tiny, even by Japanese standards... I live in the SF Bay Area, in a 500 sq ft small apartment. My walk-in closet is bigger than the BW room in Japan. The pictures might look good but they don't give you the right prospect. Room, bed, and bathroom are incredibly small. I didn't even have a place to put my carrier-on size luggage.
Breakfast is charged, unless you get a packaged deal. Food is mostly processed and very oily... Very unlike the American ones.