Credits:
TL/QC: Dyrea, arbshortcake, xIceArcher
TS: Yujacha, AirCookiee
KFX: AirCookiee, Dyrea
Source/Encode: NHK
FAQ
Can I have your permission to use your subtitle files to re-translate into another language?
Yes, you can use mkvextract to extract out the necessary files, just make sure to give credit where appropriate.
I see a bunch of weird video/subtitle issues.
Use the latest version of MPV instead.