The site was too small to build a building commonly referred to as a building. Besides, it had to setback 3m from the building line because of the aesthetic zone. In this situation, we began to take a closer look at the site. In order to fully utilize this site as an economic logic, it had to go up high but narrow. That made the building vulnerable to lateral forces, and the size of the columns exceeded the size we usually imagine. The site was so small that we couldn’t put such huge columns. We were considering a structural engineer, and we got the idea that if we made a column with a brace, we would be able to secure structural stability while getting a sense of openness.