Hon Tsuyu is basically extracted bonito and japanese niboshi sardine oil mixed with soy sauce. It's used as a soup base for noodles such as Ramen. Delicious Japanese Ramen noodles. Each pack contains 8 individually wrapped bundles of premium ramen noodles. Ramen cooks quickly (in just over five minutes) and easily absorb the flavour of broths, sauces or seasonings.