Brief synthesisThe Ogasawara Islands are located in the North-Western Pacific Ocean roughly 1,000 km south of the main Japanese Archipelago. The islands are the habitat for more than 100 recorded native land snail species, over 90% of which are endemic to the islands. When taking into account their small area, the Ogasawara Islands show exceptionally high levels of endemism in land snails and vascular plants. Future invasions have the potential to compromise the very values the Ogasawara Islands have been recognized for and therefore need careful and continuous attention. The 2010 multi-agency Ogasawara Islands Management Plan and companion Ogasawara Islands Ecosystem Conservation Action Plan cover a wide area of 129,360 ha and include controls beyond the property such as ship navigation routes.