black and japanese and conflicted

hello from a throwaway account! my obachan is japanese, my grandpa is black, and she was kicked out of her family because of my grandpa. i am very extremely proud of my heritage, and i was wondering if it would be offensive to wear traditional japanese clothing and tell people i am japanese and black. i look black and i don't mind that, but i grew up in a very japanese household. i am sorry if this sounds weird and offensive, be honest with me in the replies. can i be oopen about thyis part of myself or would it be offensive and look like i am clutching to things that make me different? thank you!