Is ketjap manis a substitute for tamari?

Ketjap manis and tamari serve different flavor profiles, so they aren't direct substitutes. Ketjap manis is a sweet soy sauce from Indonesia, known for its thick consistency and sweetness, while tamari is a Japanese soy sauce that is typically gluten-free and offers a richer, saltier taste. If you need to substitute one for the other, consider adjusting the sweetness and saltiness to match your dish's requirements.