Soy-free Japanese Chashu Pork

Any ideas on making chashu (for ramen) without any soy products? I am allergic to gluten and soy.

I use coconut aminos as a substitute for soy sauce, but it's not salty enough. And, it's much more expensive than soy sauce.

I've found a soy-free miso online, which is also an option.

Any ideas on different flavor profiles or ingredients to make this work?

Thanks!

 

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