This year, I single-handedly executed a renovation project in Suita City as a skilled carpenter. The project involved restoring 140 square meters of aged flooring to a glossy shine and reviving a damaged Japanese-style alcove using a sander and urethane paint. Despite being a 30-year-old property, it was rented out at a high rate, immediately signed by the first client who viewed it. My solo effort in purchasing materials and undertaking the work significantly reduced the construction costs.
However, I recently heard about the high costs of construction for the Type X pavilions at the Osaka Expo. I believe the reason for this is as follows:
(Worker’s Salary + Material Costs + Contractor’s Margin) x 1.2 (Broker’s Margin)
With five brokers involved, the multiplication factor becomes 2.48 times after repeated application:
1.2 x 1.2 x 1.2 x 1.2 x 1.2 ≈ 2.48 times
Additionally, a consumption tax of 1.1 times applies to each of these elements.
Therefore, the construction cost of my Suita City project multiplied by more than ten times equals the construction cost at Yumeshima for the Expo.
Expo 2025 in Osaka is entangled with countless incompetent brokers, not just in construction but also in other sectors, both domestically and internationally.
Eliminating these brokers and appointing skilled coordinators is essential for efficiency and cost-effectiveness in such large-scale projects.
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