The latest world tsunami is a topic that often shocks the global community, considering its potential large impact. A tsunami is a very large sea wave that is usually caused by seismic activity, such as an earthquake, volcanic eruption, or underwater landslide. Understanding the causes and impacts of tsunamis is very important in disaster mitigation efforts. In recent years, several large tsunamis have hit various parts of the world. For example, the tsunami that occurred in New Zealand and Indonesia in 2021 shows how vulnerable these countries are to this natural disaster. When a strong earthquake occurs under the sea, tsunami waves can be created quickly and destroy infrastructure, affect human life, and worsen environmental conditions. One important aspect of a tsunami is the existing Early Warning System (SPWA). SPWA plays a vital role in providing timely and timely information to residents in tsunami-prone areas. For example, after a major earthquake, automated monitoring is carried out to identify potential tsunamis. The accuracy of this information can save many lives, giving people time to evacuate to higher ground. Tsunamis also have long-term impacts on ecosystems. When a tsunami hits, sea water carries substances and particles from the seabed to land, which can increase soil salinity and damage agricultural land. This impact is often felt years after a tsunami occurs. Environmental rehabilitation efforts are important in post-tsunami recovery, including replanting vegetation and restoring natural habitats. Mitigation approaches also include community education. People who are educated about how to deal with tsunamis are better prepared to face emergency situations. Evacuation training and disaster simulations can help increase residents’ awareness and preparedness. With developments in technology, tsunami modeling is increasingly accurate and can include many variables that influence wave conditions. Historical data and computer simulations can provide a clearer picture of the potential of affected areas. Tsunami-prone countries, such as Japan, continue to invest in monitoring technology and research to improve warning systems. In a global context, monitoring potential tsunamis is of concern to the international community. Organizations such as UNESCO through the Intergovernmental Oceanographic Commission (IOC) program have made efforts to increase the capacity of member countries to respond to tsunamis. International cooperation to build a tsunami warning network is very important in dealing with this threat. Preparedness is key in dealing with tsunamis. When information and resources are managed well, the risks faced can be minimized. Governments and disaster management agencies must work together to ensure that everyone has access to the necessary information about how to act during a disaster. Tsunamis are disasters that cannot be completely predicted. Therefore, being proactive in building tsunami-resistant infrastructure and educating the public are vital steps to protect lives and the environment. The survival of communities living in tsunami-prone areas depends on understanding and responding appropriately to this threat.