Credits:
TL: arbshortcake, xIceArcher
QC: Dyrea
TS: Yujacha, AirCookiee, Dantalian
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.