The broader "this" seems at the root of a lot of Japanese IT anachronisms.

Incredibly conservative culture (especially with regards to business hierarchy) + early social digitization = huge number of antiquated systems

The typical way things would finally get replaced in most companies ("If you're not migrated by X date, we're cutting it off, and your stuff will stop working") seems pretty anathema to Japanese corporate political expectations ("Don't make someone else look bad").

Or maybe some weird TRON thing? I know that Japan has some interesting and widespread-yet-exotic-for-us embedded things, some of which are bound to end up in their ATMs.