What is Una kyu in sushi?

"Una kyu" isn't a term used in sushi. It's likely a misunderstanding or a misspelling.

Here's what you might be thinking of:

* Unagi: This is the Japanese word for "eel." It's a popular sushi ingredient, often served grilled and glazed with a sweet and savory sauce.

* Kyu: This word doesn't have a specific meaning in sushi terminology.

If you could provide more context or clarify what you're looking for, I might be able to give you a more accurate answer.