If you are approaching from the center of Tokyo using the expressway, exit at Shibaura exit.
Turn right at the fourth traffic lights (Konan Elementary School) after taking the Shibaura exit (not counting the traffic lights at the exit). (Note: There is a right turning lane at these traffic lights). Turn left at the second traffic lights (Shin Konan Minamibashi), then right at the seciond traffic lights (Philips on your left hand side), proceed straight ahead, take a left turn at the bottom, and you will see a row of buildings to your left. It is the fourth building down the street.