This was at a Japanese speedrunning event. Pretty cool to see! Much kudos and respect to all the Japanese players, they solidly support these games even after all this time. They are an inspiration.
See it here:
https://www.twitch.tv/videos/1690512775 (https://www.twitch.tv/videos/1690512775)
Twitch have a nasty habit of ditching VODs ASAP, so I've ripped a copy and it'll be available on my YT channel by the time you read this: