I was originally planning on bagging both Oputateshikeyama and Bieidake on this trip, however did not manage to summit any of them due to a foot injury and bad weather. I made it as far as Bebetsudake, just another kilometre or so from Oputateshike, and spent the night at the Bieifuji and here are some photos of the trip. Hopefully I can do a full description of the hike in the future.
*Note: Like a lot of huts in Hokkaido, this hut is technically only meant to be used in case of emergencies. Don’t count on always being able to stay there and you will have to bring everything as nothing is supplied. The building itself is quite small and basic, and rather dirty and moldy when I visited. There is a designated camping area next to the hut.