Olive is a wiki site that gathers and shares practical knowledge during a disaster. The project was named Olive, derived from the letter O (an emblem of the Japanese national flag) + Live (to live on). Ideas were quickly gathered with help from worldwide, on how to build necessities to survive in affected areas without the supplies. It achieved over one million page views within three weeks. It is still expanding today as a database of disaster countermeasures using collective intelligence.