Japan’s Coast Guard Hydrographic and Oceanographic Department has released a free Minecraft map built from real submarine topographic data. Players can explore the seabed from Tokyo Bay to the Mariana Trench, including detailed areas such as the Izu Islands and Iwojima ridge. The terrain is scaled for better navigation, and the map includes a coordinate lookup tool that generates teleport commands to specific real-world locations. It is available for both Java and Bedrock editions and focuses on exploration rather than survival gameplay.