Chashu

The origins of chashu came from Chinese barbecued pork called Char Siu . 
Traditionally Chinese char siu is marinated in soy sauce, honey, hoisin sauce, rice wine, five spice powder and red food coloring, and then roasted in a covered oven or barbecued over a fire. 

Ingredients

• ¾ lb. pork belly block
• 1 tsp. salt
• ½ Tbsp. oil
• 2 inch ginger, sliced
• 1 Tokyo negi (or leaks/green onions)

Seasonings

• ⅔ cup water
• ⅓ cup sake
• ⅓ cup soy sauce
• 3 Tbsp. sugar
  

http://www.justonecookbook.com/homemade-chashu/