Unagi no kabayaki (grilled eel)

"Unagi" is a kind of eel.
"Kabayaki is a dish of fish which is filleted, and took out bones and grilled with sweet soy based sause.
the sauce is important.
Because Unagi has no taste.
So how to make the sauce is top secret of Unagi shops.

Grilled eel is popular in Japan.
In the Kanto rigion(Ttokyo and Surround ), eel is steamed befor grilled.
So, mature and fat eel is selected.
Because unnecessary oil is droped out when eel is steamed.
In Kansai rigion( Osaka and surround ), eel is grilled without steamed.
Not so fat eel is selected.

Unagi is highly nutritious.
It is rich in vitamin A,B1,B2,D,E.
And it is also rich in DHA, EPA, iron, zinc, calcium.
Especialy , it is highly rich in vitamin A.