Step 1

Gather all the ingredients.

Step 2

Add sake, mirin, soy sauce, kombu, and katsuobushi and bring it to a boil.

Step 3

Reduce the heat to low and simmer for 5 minutes. Then turn off the heat and let cool.

Step 4

Pass the mixture through a fine-mesh sieve (reserve the kombu and katsuobushi - see below). This mentsuyu is concentrated.

Step 5

Follow the noodle recipe instruction.

Step 6

You can store Mentsuyu in a mason jar in the refrigerator for up to a month.

Step 7

Use the leftover katsuobushi and kombu to make Homemade Furikake Rice Seasoning. You can also save the drained katsuobushi and kombu in the freezer until you're ready to make Furikake.