Specific background information on cancer patients affected more severely by crisis and disasters is lacking. We experienced an advanced breast cancer patient whose hospital visits were interrupted for two years due to multiple internal and external factors. These factors need to be taken more into account for breast cancer management.

We experienced the case of a patient with advanced breast cancer who failed to receive comprehensive care despite regular video conferencing with her physician during the COVID-19 pandemic, resulting in delayed detection of liver metastasis. Inter-hospital collaboration is required to provide uninterrupted cancer care to those disproportionately affected by crises.

Little is known on how disasters interact in their impacts on patient care. We experienced a breast cancer patient whose initial presentation was delayed for two years due to the COVID-19 pandemic and Typhoon Hagibis. Increasing awareness is needed on the combined impacts of disasters on breast cancer management.

We experienced an advanced breast cancer patient who failed to receive diagnostic imaging despite regular video conferences with her physician during the COVID-19 pandemic, resulting in delayed liver metastasis detection. Recognizing shortcomings of telemedicine and collaboration among medical institutions for uninterrupted cancer care is imperative during the pandemic.

The construction of apartment buildings after the disaster and the way of living there fostered the social capital of the original area. Community formation made it possible for elderly people living alone to respond to emergencies and prevent lonely death. It can be proposed to the future super-aging society.

Cancer patients, particularly those post-surgery, are prone to skin infection following immersion in flood waters. We reported secondary surgical site infection in a postoperative 80-year-old post-operation breast cancer patient affected by Typhoon Hagibis. Individualized responses based on individual and environmental risks are crucial to alleviate the damage of disasters.