This is the second arrest in connection with a threat against Square Enix this year. In April, a sent a message to the company saying “I’m coming to kill you tomorrow” after spending around $1,800 USD trying to get a specific item drop.
Damn, anti-loot box terrorism going down in Japan. My preferred method of anti-loot box terrorism is to not spend $1,800, or any amount, on loot boxes. I think it's more effective and avoids all that unpleasantness with the authorities. Plus I don't feel like a massive chump afterwards.