SIDE by SIDE is a distinctive office building located in Chuo Ward, Tokyo, completed in 2000. Designed by Concertino, this structure exemplifies the architectural sensibilities of early 2000s Tokyo commercial design. The building's name reflects its conceptual approach to spatial organization, emphasizing adjacent relationships and collaborative office environments. With its functional layout and contemporary aesthetic, SIDE by SIDE serves as a notable example of Tokyo's commercial architecture from this period. The project demonstrates thoughtful consideration of modern office requirements while maintaining architectural integrity within the urban context of central Tokyo's business district.