There is very little known about the habits and extinction of the yamatomimizu. It is only known from a single holotype collected in 1820 near Nagasaki, Japan by a Dutch collector. There were efforts taken in the 1930's and in 2018 to relocate Japan's earthworm with no specimens recovered. The Nagasaki region has undergone many changes over 200 years since the Japan's earthworm's first collection such as the Meiji Restoration in 1868 & US Occupation. The area has undergone the loss of habitat due to urbanization, industrialization, and agrichemical farming. Nagusaki was also heavily bombed during WWII, although the Japan's earthworm was likely extinct before that time. Although Jurassic Park is fiction, scientists are working on several de-extinction projects. In fact, in 2003 scientists did bring back the extinct Pyrenean ibex, a type of wild goat, for 7 minutes before it died, showing de-extinction is possible. The yamatomimizu might be a candidate. Scientists would potentially use DNA from the one museum specimen in the Leiden museum. There are many conservation efforts currently underway in Japan to protect the land, sea, and wildlife there. According to the National Parks of Japan website, "The Ministry of the Environment, local governments, academics, and NGOs work together to protect endangered species such as the Japanese crested ibis, rock ptarmigan, Blakiston’s fish owl, Japanese crane and Amami rabbit. Their initiatives include artificial breeding and habitat-improvement programs." If the Japan's earthworm was brought to life, could it ever be reintroduced to its native homeland in Nagasaki, Japan?