Where does “双子宮” come from?

双子宮 (Japanese) comes from Japanese 宮, from Middle Chinese 宮.

Ancestry of “双子宮”, step by step

双子宮 traces back through two separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanesethe place where a god resides: a shrine; a temple...
2Middle Chinese

via Japanese 双子

StepLanguageWordMeaning
1Japanese双子twins
Every word from Middle Chinese Every word from Japanese