Japanese soy sauce (shoyu) is made from a combination of fermented soybeans and wheat. Its flavour is slightly sweeter and less salty than Chinese soy sauce, which is produced solely from processed soybeans. Shoyu is available in Asian grocery stores. We found it an essential ingredient in reproducing the sauce commonly served in Japanese barbecue restaurants (yakiniku). If not available, you can use whatever soy sauce you have on hand.
Once the sauce has been strained, the residue left in the sieve will form a paste. Do not discard the paste. It can be served as a condiment with grilled steak. It’s a real flavour bomb!