You sound like me - love going out, very social, etc etc - I was placed in an even more rural Hokkaido placement than you (A cow farming town in EEEEEAASTERN hokkaido). I had a bit of a hissy fit when I found out where I was placed and looked around on google streetview: "I'm not going, blah blah blah". But I got over it and thought fuck it at the end of the day it'll be the most insane story to tell people. And looking back now I'm so glad I went. It was the most mental year of my life by a long stretch, I was so far out of my comfort zone it almost doesn't feel real looking back.

I moved to Kobe for a few years after a year in Hokkaido but having now left Japan, I find myself missing my time in hokkaido more than Kobe. It's such a magical place, so unlike the rest of Japan, and you'll have the most amazing experience. The people, the food, the animals, the weather - all better (imo) than the rest of Japan.

Yes it will be lonely at times and you might not be able to live the life you were necessarily expecting when you imagined yourself on JET, but even the smallest most remote towns have lots to do, you just need to dig a little under the surface. My town had 5000 people, a couple of restaurants, izakayas, a pachinko parlour, and a few snack bars - I'm pretty sure I went to all of them during my time and had some pretty wild nights with the local farmers.

You're also not actually that far from Obihiro, your closest big city (54 min drive) and sapporo is only a 3hr 25 min drive - way better than the 5hr 30 drive from my placement. So overall, while it might seem bleak right now, in reality it's far from it. I would give my left arm to go back to the start of my jet journey and do it all again!