Just one question is this the East Course of Ebisu Circuit?
They have several Courses at Ebisu Circuit.
The main course is the east course with a length of 2061 meters.
The west course has a length of 2103 meters.
The north course has a length of 1155 meters.
The south course has a length of 1155 meters.
(Mostly used for drifting... seen on D1GP for example)
And there is a Touge Course and more...