Banjiro or bantejiro (both mean guard castles): A branch castle without its own lord, directly controlled by the main castle (Osaka-jo Castle and Nijo-jo Castle in the Edo period are among such castles of the shogunate government).
番城・番手城　城主がおらず本城から直轄されている支城　(江戸時代の大阪城や二条城なども公儀の番城としてこれに当たる)