Somebody is watching me

Several months ago I passed this floor to ceiling sculpture / glass art installation in Shinjuku Station.  I really liked it, but had the erie feeling that someone was watching me.... and perhaps the 3.64 million people per day that pass through this station. 

According to Tokyo Metblogs this installation is by the artist Miyashita Yoshiko and has been at the west exit of Shinjuku station since 1969.