Studio D'Artisan SP-112 'Ishikawadai' Loopwheel Sweatshirt - Navy The "Ishikawadai" series is an extraordinary creation that transports us back to 1953, when it was crafted by Ishikawa Seisakujo. In contrast to modern ring-spinning machines, the "Ishikawadai" operates at a considerably slower speed—about one-third of that of its contemporary counterparts.