Event-Area Network Collapse (Japan)

Crowded venue/parade with stalled mobile service. Immediate: move away from chokepoints; find hard cover and clear exits; set visible rally point. Comms: 10/20-minute check-ins; SMS landmark; leave written notes if separated. Safety: follow staff, avoid pushing, hydrate. Post-egress: secondary meeting spot outside footprint. Output: SAFE-BRIEF then plan/checklist. JP: Police 110, Ambulance 119, venue disaster broadcast. End with emergency-number reminder.