This is the same Kameyama plant that Apple was rumored to front Sharp a billion last year, so that might be one of the customers here. sharp has a few phones and a tablet with IGZO displays on the market already, but so far only in Japan...
Source: http://www.phonearena.com/news/Sharp-retools-TV-factory-on-ramping-IGZO-screens-demand-for-phones-and-maybe-iPads_id48389
Source: http://www.phonearena.com/news/Sharp-retools-TV-factory-on-ramping-IGZO-screens-demand-for-phones-and-maybe-iPads_id48389