Oshiya is the Pusher profession in Japanese transport due to crowded subways, where a Pusher helps passengers and ensures belongings aren't jammed in doors.

The claim that Japan employs Pushers in the subway system due to crowding is supported by multiple sources. Oshiya, or train pushers, are used particularly in Tokyo to manage overcrowding during peak commuter hours. Multiple articles and reports confirm this practice as a measure to efficiently handle high passenger volumes. Although no direct professional fact-checks were found, the consistent corroboration across independent sources provides strong support for the claim. Therefore, it is rated as factual with a high confidence level based on available evidence and high-quality sources.