I read some and skimmed the rest. The TL;DR version is:
-"I like video games and anime and shit from the 80s and 90s! Fuck the stuff now!" (Very important reasons to want to live in a country, Tim.)
-"I like to ride trains and sip Coke Zero!"
-"I hate people who smoke n' shit! WHY DOES THIS MATTER?! CUZ THAT FAMICOM GAME I BOUGHT SMELLS LIKE TAR"
-"The foods have meat products in them!"
-"'Mandatory' company parties suck!"
-"A bunch of Japanese culture stuff is annoying to me now!"
Go home, Tim. You're an over-the-hill weeaboo. It's time to leave.
BTW, when I was living there, I found those "mandatory" enkais to be pretty stupid. So I didn't go after going to one or two of them, especially when I noticed that none of the younger teachers ever showed up. Guess what? NOTHING CHANGED IN THE WORK PLACE.

Teachers stopped bugging me about going after a while, especially when I made it clear that I didn't drink. I did get an offer to go to an onsen with all the male teachers, which I politely declined. "Are you sure?! It's ONLY 30,000 YEN FOR ONE NIGHT! You can pay in installments the rest of the year!"
My enkai story: One of the few I went to was at some shitty little izakaya. A lot of these places are like little tatami mat rooms in your house, only with someone bringing you food and drink. Anyway, when it's over, most of the teachers went home. The few that didn't (all male) went onto a host club. I declined this invitation. One of the teachers, who never, ever spoke to me at school, walks up to me and essentially says "what are you, a cigarillo?!" I wasn't able to do anything before another teacher immediately stepped in and drew a heart symbol in the air with his hands, and said "no, no! He's all in love with a girl! Leave him be!" I told the English teachers that were still there "yeah, and I don't have to
pay for mine, either!" That was fun.