Renzo Piano's Kansai International Airport in Japan is sinking, according to reports. Observers have reported cracks, though these are unconfirmed, while the building columns are being jacked up to keep the roof level. A TV expose on the drama at the 1.7km long terminal designed with engineer Arup has been screened, even showing how a stair fixed to the side of the building has had to have a new step built underneath. The reason is thought to be that the artificial island on which it is built in Osaka Bay is itself sinking. The Arup director in charge of the project, Phil Dilley, said the terminal was designed to accommodate the island sinking.