looking back at null's post made me realize the rope is already tied to the door knob, and someone a while back translated the japanese autopsy report (I think it was the autopsy report) and said that it was noted he killed himself with the door knob.
Dude already had everything set up ready to go from the first photo he sent.
He last went to work on the 24th of June 2021, which was a Thursday - and didn't show up to work on the 25th, the Friday.
His first email to Null is June 26th at 12:59 PM. Assuming Null was in Central European Daylight Time, that would have been about 8PM on Saturday night in Tokyo. There's a back and forth over the next couple of hours, and Byuu sends an email at 2:51 PM, which would have been nearly 10PM on Saturday night, further detailing his credentials and suggesting he could work for KiwiFarms as a coder. One last email was June 27th at 3:12AM, about 12 hours later, where he claims "I've already taken several codiene and intuniv to crash my blood pressure, and now I'm getting myself as drunk as I can." That would have been 10:12 on Sunday morning in Tokyo.
His farewell messages to Blumier, where he says he's already taken "ten codeine and ten intuiv", are at 10:46 on Sunday morning in Japanese time.


The police report references his suicide call taking place shortly after 11AM, although the Google Doc claims 11:45AM. He stops speaking on the call after half an hour (which would match up with the estimated time of death being approximately 1PM, and police visiting the apartment that evening speculating the power was off - no lights would be on in the daytime). Null didn't reply until 12:18 PM his time, which was 7:18 PM Japan time, and publishes them at about half past the hour. Byuu was dead long before these emails became public (in fact the police were seemingly trying to get into the apartment at the time these were published).
So I think the whole thing does basically show a timeline of Byuu hitting rock bottom and skipping work on Friday, potentially spending Saturday getting wasted and tying a noose before trying to send a Hail Mary to Null, then waking up on Sunday morning to find that Null hadn't replied to his bargaining email about potentially coming to work for KiwiFarms - and so deciding to start overdosing before finally getting blitzed enough to go through with the hanging a few hours later.
In terms of what could have triggered it? We'll never really know. The zoophiles argued about "Blumier getting harassed for child grooming" being the root cause, and plenty of people would say it was this thread (which was inactive). I think a contributory factor could have been Nintendo. They'd successfully prosecuted RomUniverse with the ruling being announced in March 2021, and they launched a case against Gary Bowser/Team Xecuter in April 2021 (who manufactured hardware that let you pirate Nintendo games), and won a lawsuit in May 2021 against 1fichier for hosting Nintendo ROMs (although that then went to appeal) and the court case against Uberchips (which also manufactured hardware that allowed you to mount Nintendo games) was in its final stages. Since Cyber Gadget was employing Byuu to make their "Retro Freak" gaming console and he was actively ripping ROMs into his preferred format from old games - could be Byuu was also getting stressed out they'd come after him?