Ultra Low Sodium soy sauce, or making my own.
Even the “low sodium” varieties of soy sauce that I have found are still too high in sodium for me (300 mg/tsp).
Does anyone know of a commercial brand that would be lower? Less than 100 mg/tsp would be great.
Failing that, does anyone have a recipe to make your own soy sauce? I have a no-sodium salt substitute that I use in place of salt in recipes, so if the recipe calls for salt, that’s OK.
Unfortunately (a) "mak[ing] your own" is not as simple as a recipe, it's a fairly big deal fermentation process. (b) I don't know for sure, but I doubt potassium chloride will get you anywhere in a fermented product - except maybe a vat full of rotten, not fermenting - soybeans. For that matter, I think what they do is actually remove sodium from the low sodium soy sauce post-fermentation, not simply use less to begin with, like they do to make de-alcoholized wine.
The Bragg's aminos sounds like an option - if you can't get by with less or diluted soy sauce - or maybe look around on a health food store's shelves in the vicinty of the soy sauce for similar products.
There is an extremely low sodium product called Shirakiku Saltless Shoyu with only 10 mg of Na per Tbsp. I haven't tried it myself, but according to reviews on the Web it tastes awful.
If you want something with decent taste try Yamasa Less Salt Soy Sauce (510 mg per Tbsp) or Kimlan Lower Sodium Soy Sauce (506 mg/Tbsp).
Making your own soy sauce is a rather involved process
and I don't think you could safety reduce the salt content.
I skip soy sauce entirely and use a blend of different sauces and spices. I use rice vinegar (unseasoned!), molasses, sesame oil and fresh ginger. Sometimes I add a touch of one or more of the following: balsamic vinegar, lemon juice, ground ginger, pepper, peanut butter (unsalted), minced fresh garlic, orange flower water. It isn't the same but it is darn good and satisfies. Oh, and sometimes chopped chives or scallions or even minced onion.