younger paternal half sister

a wife's sister

(archaic, men's speech) an intimate form of address for a female by a male: "my sister"

limited express train; special express

a special ward, a district (a municipal or other geographic administrative area) / (specifically) one of the 23 special wards of Tokyo

special needs

(criminal law) criminal legislation that is not codified in a criminal code

(formal) we, us

(honorific) we; us

I am Japanese