Here is an article about a donut chain, called "miel" which started in the Kansai area and is now opening a shop in Ginza, Tokyo. The donuts are baked instead of fried and contain ingredients such as collagen. The calories are 2/3rds that of regular donuts. As you can see from the pictures, the atmosphere is definitely not that of a fast food restaurant - more like Starbucks. I do not see prices for individual donuts, only donut sets with pastries which go for around 1,110 to 1,300 yen.