The Amagasaki Derailment [video]
youtube.com
youtube.com
It’s a quite interesting channel, worth following IMO.
There are some gems in the rough though. If this genre of video interests you, definitely check out the USCSB (U.S. Chemical Safety and Hazard Investigation Board) channel.
Youtube is definitely developing a subculture of channels that essentially copy existing work and put them in video form. I guess they are generating bespoke content - There's a fair bit of effort that goes into creating an engaging and cohesive video. But the fact that most of them do not properly acknowledge sources leaves a bad taste in my mouth.
Don't be, there's a lot of art in the presentation style. This particular channel puts a lot of effort into being very respectful and presenting a certain tone and speech register which I find rather charming. Of course not all channels do add this kind of value, but just ignore the ones that don't! :)
Besides whatever causal chains contributed to the derailment, there were already multiple signs of some kind of immediate problem, when they were stopped at a station.
At that point, someone (including the driver) could've said a few things went wrong on the trip, and something isn't right, so, "out of an abundance of caution", held the train at the station. Then, whatever checklist of mechanicals after what had just happened, while swapping out the crew (to get their report, and to remove them as an immediate risk just in case they were somehow impaired).
It could be treated as commendable professionalism, to hand over the controls after any small incident, as a matter of standard practice, more important than hitting the on-time metric window. (Towards the end of the video, they go into how this didn't seem to be the culture.)
Then the impact would've been (guessing) a couple hours of cascading significant commuter delays, due to the stopped train -- rather than 106/107 dead, and 562 injured.
Doubly tragic, that they could see something was urgently wrong, and all they needed was one person to say to hold the train.