たいしかん大使館taishikan
1.
A diplomatic premises where an ambassador conducts official business in a foreign country, serving as the representation of their home nation.
2.
A legally protected site that operates under international law, regarded as an extension of the ambassador's home country, granting it inviolability and certain privileges.
3.
An institution that facilitates diplomatic relations and communication between the government of one country and that of another, often providing support and services to citizens abroad.
Example:
大使館は最高裁判所に隣接している。