My research aims to examine the development of manga as a transnational and globalised cultural product in Thailand. By analysing the adaptation of shōnen action and adventure manga – one of the most consumed manga themes in Thailand, I seek to understand the way Japanese manga is adapted under the influence of globalisation and transnational flows. To carry out my research, I examine two of the most influential Japanese shōnen action and adventure series from two different eras – Dragon Ball and One Piece, and one Thai manga of the same genre titled Ogre King.