noun, noun which may take the genitive case particle 'no'
outside the premises; off-site
Refers to areas outside a specific facility such as an office, laboratory, or power plant. Often used in contrast with 所内 (on-site).
所外での作業は許可が必要です。
Work outside the premises requires permission.
所外の人間は立ち入り禁止です。
Off-site personnel are not allowed to enter.