Kami-Kumagaya station is so small it only has one platform for trains going in either direction. It also doesn't have a ticket gate. Instead of putting your ticket in a machine you buy the ticket from the ticket machine and hand it to the station attendant when you leave the station (show it when you enter).
This is mind-blowing because even at the stations without attendants, the stations closer to Tokyo (such as on the JR Nikko line) have a suica swiper at the entrance. This line isn't suica (IC card) compatible...which is completely amazing. I am mesmerized by the anti-tech.
EDIT: I say closer to Tokyo but I suppose the Nikko line isn't. But it's JR and that makes a difference.