noun which may take the genitive case particle 'no'
biracial; of two races
Describes a person or group having two racial backgrounds. Often used attributively with の, as in 二人種の子供 (biracial child).
彼は二人種の家庭で育った。
He grew up in a biracial family.
二人種の子供たちは、両方の文化を経験できる。
Biracial children can experience both cultures.
ハーフ is a common casual term for a person of mixed Japanese and foreign descent, whereas 二人種 is more formal and not limited to Japanese context.
Compound of 二 (two) + 人種 (race). The exact historical derivation is uncertain, but the term is transparently formed from its components.