Spam Musubi

1 can light spam (slice into 8 pieces)

2 Tablespoons sugar

2 Tablespoons soy sauce

1 Tablespoon mirin

1 Tablespoon oyster sauce

1/4 cup hot water

2 Tablespoons sugar

1 Tablespoon soy sauce

2 tsp mirin

2 tsp sesame oil

1/4 tsp garlic powder 

1/4 tsp onion powder 

1/4 tsp pepper