I never realised JP Morgan was such a large shareholder of Nintendo. Maybe now is the time for a non Japanese director on the board. Certainly Nintendo, and other Japanese companies on general could do with a fresh perspective. It worked for Nissan when Renault CEO Carlos Ghosn (French Lebanonese) took over and completely revamped the business.
Nintendo fills the "Internation, Large Cap Equity" target for ETFs. That's probably what is happening re: JP Morgan. So, mostly I imagine this is a part of 401k portfolios, etc.
Here's a funny blurb from Wells Fargo 2012, their Wells Fargo Advantage International Equity Fund. Again, mostly this would be owned by individual Americans through their retirement accounts:
Our underperformance within information technology can be
attributed to our investments in Nintendo Co. Ltd., a name that we
just got wrong, and HTC Corp. Our thesis on Nintendo was that with
the aging of the Wii and the limited success of the DS3 handheld
device, investors had become overly negative on the companys
product cycle. We thought that sales of the DS3 would improve as
more game titles came to market, but the pace of publication fell
below our expectations, and the stock price deteriorated further. We
sold the position during the quarter.