This thesis research if the Japanese wood joinery method Kigumi or Tsugite-Shiguchi can be implemented in Swedish building practice. The focus of the study is on demountability, reuse capability and circular construction. A theoretical study and comparison between the Japanese joints Watari-ago and Nuki-joint, the Swedish traditional joinery methods knuttimring and skiftesverk and modern methods such as screws, spikes, metal brackets and glued wood components. Results show that Kigumi has advantages in demountability, material efficiency and reuse potential by being constructed completely out of wood and relying on its own weight and the fitting of its design. Knuttimring and skiftesverk have some reversible qualities but they don’t reach the quality of Kigumi. The modern methods have superior mechanics but perform much worse with circular building and waste management in mind. The study concludes that Kigumi has good potential for circular timber construction in Sweden, but it needs to be modified and updated to fulfill the Swedish standards with better resistance against different elements and more efficient production.