In conjunction with the expansion of the entire terminal building to accommodate the increase in international flights at Haneda Airport, the JAL International Sakura Lounge was expanded and renovated to be 2.5 times larger. Based on the Japanese concept of "Room To Room," where rooms are connected but separated by partitions, the number of corridors was reduced, and the floor was finished with an open feel, with original lattices and gently partitioned washi paper sand glass, allowing each seat to have a view of the runway while still maintaining privacy. In addition, the split-level floor that offers a wide view, motifs that evoke the sky and travel, and flower petals that symbolize the Sakura Lounge were all created using traditional Japanese techniques to create original art that fits the theme, embodying a refined and sophisticated concept of "tradition, innovation, and the Japanese spirit." We assisted with design, layout of this project. <Awards> *BEST 100 at the "JCD concept design Award 2015" *Selected for the "Japan Space concept design Award 2015" Areas of responsibility: design, layout