If one day you`ll be walking near the Metropolitan Theatre at the West Exit of Ikebukuro station it is likely you are going to notice this building for two factors:
the colour and the shape.
Probably back in those days there was more choices than today when it came to design the skin of a building. I do not know how long this building will stand more. It is worth give it a smile than.
From the Architect website, we can learn the projects which were signed by his hands. His profile seems not been updated unless he became a member of a Japanese Institution after 2011 and his awarded renovation in Nanba station (Osaka), here a video-link.
He is been teaching regularly at Nihon University and at Waseda University. Here below the same building, much inserted in the surrounding.