Dried sardines

Not vegan. If you see it, put it back.

Also spotted as

煮干niboshi

the same, written without し

いりこiriko

the same, as it's called in western Japan

煮干しだしniboshi dashi

dried sardine stock

Where it hides

Ramen broth (煮干しラーメン is a whole style), miso soup, home-style stocks.