I only just saw this building yesterday. It is designed by General Design and is the flagship store for Lad Musician in Nagoya Japan. What makes it so interesting is how light and open everything inside feels despite there being no openings on the walls except for the entry door.
I like how textural the finish of the concrete is.
I'm not sure how they deal with heat loss/gain, which is usually a huge issue with skylights. Possibly they used Danpalon or a similar plastic material instead of glass, but the quality of light doesn't look diffuse enough to be coming though such plastic sheeting.