This is a truly authentic Japanese recipe - at least it's the same recipe I was taught back in the 70's at Toronto Japanese Canadian Cultural Centre's cooking classes. It is delicious and easy to make. If you're not close to a Japanese grocery, most large Japanese supermarkets will ship or buy online! I love Japanese cuisine and used to order my staples from Union Grocery in Toronto's Chinatown when I lived in the hinterlands. They arrived at the train station with a handwritten bill that I paid with a return cheque!!! No PayPal gang....