Itoigawa Jadeite information Niigata Prefecture itoigawa jade is Jade appeared for the first time, in the history of the world. There was much long ago, said Guy nagawa in itoigawa, Niigata Prefecture, ancient nation. Jade jade can be taken in the provinces is very strong spiritual power and, known in Japan Japan, sought were being handed out. He called the God ōkuninushi (Izumo-Taisha Shrine) to represent Japan came all the way to our region, as beautiful as jade beads, wise says nagawa Princess applied for a marriage proposal. Itoigawa jade is in current mining is forbidden. But local itoigawa in transparent green the hardly seen, are becoming increasingly rare.