Shio-koji (salt-fermented rice malt) makes chicken ham moist and tender all by itself. These days shio-koji is a must for me.
Ever since I started making my own shio-koji, I've been using it to pre-treat all kinds of dishes, so my chicken ham also uses shio-koji now.
To marinate the chicken in Step 1, put it in a plastic bag.
Enjoy Japanese food around the world.