Kugane Maruyama is a Japanese author best known for his work in the light novel genre. He gained popularity with his series titled Overlord, which features a unique blend of fantasy and gaming elements. The story follows a player who becomes trapped in a virtual reality game and takes on the role of a powerful undead overlord. In addition to Overlord, Maruyama has written other works that explore similar themes of adventure and character development. His writing is characterized by detailed world-building and complex characters, making his stories appealing to a wide audience of fantasy enthusiasts.