Based on a simulation of casualties potentially affected by a Northern Tokyo Bay Earthquake, we examined the limits and possibilities of medical relief activities and building space at disaster base hospitals. Considering casualty numbers over time, we determined details about the overall space required to deal with affected patients based on degree of urgency and ascertained the needs of each area. We found that the yellow area (for high-risk patients) was relatively large; however, it was also found that affected patients remained and continued to accumulate in the red (critical) area for some time after the disaster.
