What are the ingredients shoyu and aji?

Question

My niece sent me a cook book as a gift from her trip to Hawaii and its got a lot of mystery ingredients. These two seem to show up most and in the greatest quantity. If they aren't available here, can you suggest some substitutions?

Answer 1

Shoyu is what you call "soy sauce."
And Aji is Ajinomoto what you call "Mono sodium glutamate"
MSG for short.