The Hachijuni Bank Ltd.

16 have been publicly named so far, including some notable names.

Toshiba, SCSK, Quick, Seiko Solutions, Hachijuni Nagano Bank, Asahi Broadcasting Group Holdings, Tobu Top Tours, and Tagawa City.

Ten additional participants will be disclosed later, after internal discussions wrap up.

And what exactly are these companies testing? They're testing a trust-based yen stablecoin called EBUI.