What am I?

Okay, so I was having a conversation with my friend the other day and the topic of our family origins came up. If someone asks me what race I am or if I fill out a form I always say I'm white, but my friend was asking where my family was from he said there's no way I'm white and now I'm majorly fucking confused. I was born and raised in america, no doubt about that. My mother was born in California, her mother was also american but her father is hispanic. My father was born in Saga, Japan. His father is american and his mother japanese. I told him this and he said I HAVE to be either asian-american, or hispanic-american. But I honestly don't know if there's enough of it in me to consider myself either of those...Opinions?

EDIT: Yes I know the ratios of what I am, and on forms I know I can put multiracial. I'm asking if I have enough asian or hispanic in me to consider myself asian-american or hispanic-american or if I'm just full blown white.