Yep, it was tested with JPN version of Wizardry. Saves and loads just fine on the AV Famicom, just says "Turbo File not connected" on the NT Mini.
It is still something of an obscure peripheral, with most of the supported games being of very little interest to anyone outside Japan, so I'm hesitant to take it for granted that it would work on the AVS. I thought it'd work on the NT Mini, but alas.