Boil eggs for 9 minutes in microwave medium power, then cool in ice water.

Mix soy sauce, water, sugar, and sake for the ramen egg marinade.

Peel eggs and marinate in the mixture for 12 hours. cover with kitchen towel for the exposed egg

Mix soy sauce, honey, sake, and garlic for the tontoro marinade.

Cut away fatty part of tontoro. marinate tontoro for 10 minutes.

Grill tontoro with lid on until tontoro is almost cooked.

Airfry tontoro at high heat for 8min to char tontoro