The Japan Coast Guard released a Minecraft map showcasing the submarine topography around Japan's coastline on May 12, coinciding with "Japan Coast Guard Day." The map is available for free download in Java and Bedrock formats and allows players to explore an artistically rendered version of Japan's underwater geography. Players start near Tokyo Bay and can encounter the Seven Islands of Izu and the Iwojima ridge, which includes active volcanoes. The map also features the Mariana Trench, the deepest oceanic trench, which the Japan Coast Guard first measured. The map can be accessed through the Japan Coast Guard's Hydrographic and Oceanographic Department website, and it includes a tool for looking up block coordinates. The initiative follows a similar project by the Ministry of Land, Infrastructure, Transport and Tourism in 2025, which created a Minecraft representation of the Metropolitan Area Outer Underground Discharge Channel.