You’d be pleased to know (at least I was) that Microsoft Word, Excel and Powerpoint have finally made to the Japanese shores after initial release in the US in April. Apart from the really bland icons it seems to work fine. And it is FREE with
Though I am still not sure how free it is until I test it more but from the blurb it seems some of the features (none that seem to be too important) are not included in the free version. So far so good though. Rather than being a ported version it is designed from scratch and seems to be surprisingly very well adapted to the iOS enviroonment.