http://www.satelliteview.co/?lid=7549173_JP_SRSTN_02&place=Okuani-eki-Japan
Hey, thanks, BarrieV - man, they sure picked a remote location for filming. I was even wondering Hokkaido, and although it's not it's pretty remote west-coast Tohoku which is about the second-most remote location area, from what I can understand. It's wild and beautiful up there it seems.
Another map with a few location photos:
http://mapcarta.com/27444024There's also a photo in summer in the location area on this PDF:
http://www.jrtt.go.jp/11English/pdf/RailwayAssist-8.pdf - last page, second photo in the second column, where the caption mentions Okuani. A few other pretty railway location scenes on that brochure, too.
Oh, and... I get the sign: Animatagi and Hitachinai are the neighbouring stations in opposite directions along the line through the valley. Cool.
From the video, it's a good thing they didn't plan the shoot for February - no trains going down that line for a few weeks, I'd say! Pity the filmmaker didn't pause a little on the signboard just before he came out onto the station platform, it looked kinda interesting. But it's good to see the context in which the video is made, and maybe he'd go back there in the spring as the snow is melting and give us another look. Thanks, kitayoshi56, whoever you are!
Anyway, I love the location, the atmosphere, the whole thing. Knowing the location brings it all even more close and alive.