The Kawagoe-sen was not electrified until as late as 1985. From then on the eastern side (Kawagoe - Ômiya) has been linked to the Saikyô-sen. ☞ See Saikyô-sen
From 1996 the west side has been linked to the Hachikô-sen, with electric trains now running through from Hachiôji via Komagawa to Kawagoe. ☞ See Hachikô-sen / Kawagoe-sen
