noun
spicy cod roe; mentaiko
Walleye pollack roe seasoned with salt and red pepper; a common ingredient in Japanese cuisine, often eaten with rice or used as a filling.
See also: 明太
朝ごはんに明太子をのせて食べた。
I ate rice with mentaiko on top for breakfast.
この明太子はあまり辛くない。
This mentaiko is not very spicy.