Basicly, 2ch is a forum on Japan that has multiple board dedicated to multiple subject, the "suspect" is a well known person on the rail road photography forum.
And like to claim he has a unique style of photographing train called "Barisaku" basicly folloing the light not taking picture against the light, and end his post with the phrase "Barisaku" and most people there know nicked named him Barisaku-san(Mr. Barisaku)
A short while later, Kyoani anime had a scene where a character play the saxophone, and in musical term, that is called バリトンサックスソロ (Baritone Saku solo) shortened to Barisaku (Well known term to music player)
And later Kyoani had a collab with rail train event, ever since Barisaku-san has trolled Kyoani board and topic, and kept on claiming how they ruined his life, etc.
And he has stopped posting since yesterday, while he tend to post daily.
So it's a guess that he is a railroad otaku that thought he had made his own "catchphrase" not knowing it is a common term used by music player and believed that Kyoani had stole it from him.
ايش ممكن الواحد يقول؟