Tokyo Gov. Yuriko Koike has received the results of an internal investigation regarding the problem of the decision not to conduct land elevation work under building sites at the Toyosu market. The investigation could not specify who made the important change to the original plan without even asking the opinion of experts.
To deal with the problem of contamination, the experts’ council, set up by the metropolitan government from Ishihara's idea, decided on soil replacement and land elevation throughout the entire compound at a meeting on May 19, 2008.
As for the fact that soil replacement and land elevation was not conducted beneath major buildings, Ishihara said, “I have no knowledge about construction methods. My subordinates decided on them by consulting a design office.”