Wild Boar Stamina Yaki

My friend Yasu went hunting the other day and got a 40Kg wild boar! Woo Hoo!
So on the advice of my good friend Ken, I cooked "Stamina Yaki" for lunch today.
Pretty good.
Just need 100ml each of:
Katsuo Dashi
Mirin
Soy Sauce.

Boil it down to 100 ml, and then marinate the meat in the sauce.
After a couple of hours, stir fry and you are ready! Serve over rice, with some salad.