My aunt shared her secret for making perfect Japanese food.  It's her method for perfect food in general, but since she's in denial that she's not Japanese, she only makes Japanese food.

"I make every recipe 100 times in a row," she told me.

As a result, her dishes (including onigiri) are impeccable and mouthwatering.

My aunt also makes you shower the second you enter her house, immediately launders your clothes (made filthy from the outside world), and directs you to change into a different pair of slippers for each part of the house.  She once refused to let my friends (who were dropping me off after dinner) into her house to use the bathroom, for fear of their germs.