The Hidden Dungeon Only I Can Enter (俺だけ入れる隠しダンジョン 〜こっそり鍛えて世界最強〜, Ore Dake Haireru Kakushi Danjon ~Kossori Kitaete Sekai Saikyō~) is a Japanese fantasy light novel series written by Meguru Seto and illustrated by Note Takehana. It began serialization online in January 2017 on the user-generated novel publishing website Shōsetsuka ni Narō. It was later acquired by Kodansha, who have published six volumes since August 2017 under their Kodansha Ranobe Books imprint.