Black-and-white negative film uses separate chemistry from C-41 color processing. Labs may offer standard developers or custom mixes, and some provide push/pull or hand developing on request.2 labs
1F, Ito-Yokado Ofuna Store, 6-1-1 Ofuna, Kamakura, Kanagawa 247-0056, Japan
1-4-3 Komachi, Kamakura, Kanagawa 248-0006, Japan