I have long ignored the Seibu Railway, perhaps because it's located in an area far from my usual haunts in southern Tokyo/Kanagawa Pref. However my growing interest in the shrinking number of flat junctions as well as the recent establishment of through running on the Toyoko Line have sparked some curiousity in this major suburban railway.
Tokorozawa is the heart of this railway, being the junction of the Ikebukuro and Shinjuku Lines. The view from the south end is especially interesting- in the following video, the left side is the Ikebukuro Line, with the flyover in the distance, the m