The article mentions he was convicted of falsifying records. Kind of surprised Japan lets foreigners with criminal records stay in the country.

And:

At shells.com, his personal cloud computing platform, he’s quietly developing an unreleased AI agent system that hands artificial intelligence full control over a virtual machine: installing software, managing emails, and even handling purchases with a planned credit card integration. “What I’m doing with shells is giving AI a whole computer and free rein on the computer”, a brilliant idea, really. AI agents on steroids.

Like managing other people's crypto, it seems like an idea that could actually blow up your face.