Adamant Field (利かぬの原, kikanu no hara) is a area located within the mountains of Kakuzensho. The field gets its name the large obelisk that is scatted though out the field. The obelisk are made up of a unique substance that absorbs and stores lunar and solar light for long periods of time. The Obelisk can be used to create various objects and weapons. The most notable is the Chōsokabe Clan who uses the obelisk in their weapon creation. It is known that Toyotomi Clan can rebuild the obelisk with their kekkei genkai tough it take time.