There is a estimation that if the evacuation was properly conducted, the majority of the two thousand casualties may have survived from the Tsunami that struck the Tohoku region in 2011.

"Nigechizu"(Evacuation map) is a method to visualize the proper evacuation route and time in the vulnerable areas for Tsunami. Initially by workshops, the residents will be enthused and alerted to recognize the risk of Tsunami using there own time and effort.

The method is feasible to conduct using daily materials; a string to measure the distance, a printed map and a few colors of pen. The method triggers conversation within the residence of detailed conditions that lay in the evacuation route.

Every applicant will participate in making the "Nigechizu"(Evacuation map) by coloring the path gradually by units of 400m (10min walk by a aged person). Resulting a infographic showing the duration for evacuation. Additionally, people can add paths, build towers to compare and evaluate the new proposal by balancing the effect and the budget.

While this method can be done in an analogue way, we have developed a web application "Nigechizu 2.0"; the same concept using the Dijkstra algorithm. By automated coloring, the same method can be applied to remote areas and areas that have extensive population. "Nigechizu 2.0" can also add paths to upgrade the whole evacuation time, and each attempt will be saved to the database as discrete proposals. The endless feedback from the local residents will ensure higher precision to the planners which is responsible for urban planning.

By combining the two "Nigechizu", we have created a method to educate and provoke the people to recognize the risk of living beside the ocean.

This method was first created through the needs of the Tohoku Tsunami disaster.






Key features: 

risk visualization
collaborative decision making


C4R "Nigechizu" movie

"Nigechizu" movie clip

Nigechizu movie clip