Nintendo has explained its decision to only release promising Wii Japanese role-playing game The Last Story in Japan. "With all the conversions, when we do it in Europe we've got to do the whole of Europe," Nintendo UK boss David Yarnton told Eurogamer. "So it's multiple languages. It has to be viable. "We've got so much on our plate at the moment. The most important one is in the first quarter this year. Kirby's Epic Yarn is the most important title. We've got some great product coming out. "On top of that, when we add in 3DS, it's just so much."