Shigaraki DAC has almost the same circuitry as the Progression DAC. It's non-oversampling, no digital nor analog filter, with passive I/V conversion.
Another feature is the casing. Both the DAC unit and the power supply are encased in a casing made out of Shigaraki ceramic, which has been used to make tea cups and vases for nearly one thousand years in Japan. It's totally de-electric and non-conductive character contributes to Shigarakis' smooth,