I haven't had Wasabi since I was in Truk Lagoon in '93. I went diving every chance that I got while working there. The dive guides would take bunches of bananas out to trade for big tuna from the Taiwanese longliners after our last dive of the day. They'd take the fish back to the restaurant on the island and have Sashimi made for later in the evening. They claimed to make the Wasabi too. Best, freshest Sashimi and Wasabi I ever had.