I know that N is really big there, and there are lots of Japanese N trains to have. But I would love to get any of these in O.
O is in desperate need to get some Japanese rolling stock. At least MTH is doing some European items. But Japan has a large and diverse rail history that is being neglected in O. I'd so buy Japanese bullet trains, commuter trains, and trollies.
I just remembered that the Series 500 has been produced in O, by Kumata Co. Ltd. or KMT--but there will be sticker shock. These are hand made 1/45 brass models, I assume two rail. A four car Series 500 starter set was $8,290 US when produced in 2011. A full consist is 16 cars. 
At the time of issue a full consist amounted to $32,500 US. A typical product cycle in Japan is to pre-order or you may not get the item and then even N gauge items sell out and disappear from the market in six months.
