武器庫 (Buki-ko) means armory in Japanese.

"Buki" (武器) means "weapons" or "arms".
The character "武" represents "martial" or "military", and "器" refers to a "tool" or "implement".

"Ko" (庫) means "storehouse" or "warehouse".
It is used in words like "shoko" (倉庫, warehouse) or "denshako" (電車庫, train shed), referring to a place where items are stored.

Putting these together, "buki-ko" (武器庫) means "armory" or "weapon storehouse" — a place where weapons are stored. This term is commonly used in military or security-related contexts. In historical or modern contexts, an armory might be referred to as a "buki-ko" within military installations or martial arts schools where training equipment is kept.