The wheels came off the Japanese economy in the early 1990s, throwing into question the expos that had emerged from and contributed to the previous two decades of growth. The first casualty was the Tokyo World City Expo, planned in the late 1980s and cancelled in 1995. By the end of the decade, there was a wave of nostalgia for Expo 70, as middle-aged creatives mourned the betrayal of its promises, or bemoaned its continuing hold on the present. But expos continued to have their uses. Alongside the laments, this chapter explores how the national bureaucracy and local authorities continued to use a new system and new kinds of expos to coordinate and foster development in the regions. It argues that the complicated genesis and unexpected success of Expo 2005 in Aichi, which evolved from a spur for regional development to the first eco-expo recognized by the United Nations, shows how expos remain a tool in the armory of development, even if observers in the West and intellectuals in Japan think their time has passed.