There are many artisan-made shoyu (Japanese soy sauce) producers and many artisan-made products made all across Japan. The finest and most unique shoyu soy sauce for sale is produced by small, family-run shoyu breweries that use quality ingredients and traditional, labor-intensive production methods. Real shoyu takes time. Like a fine wine or a traditional balsamic, you can speed up the process, but the product ALWAYS suffers a result. Always.