The cites Iwata-san's bile duct problem as the cause of death.
My thoughts are with his family and friends.
This is a sad day for Nintendo. Sure, some questioned his leadership as Nintendo boldly, if not stubbornly, stayed on its own path. But he also led the company through its most profitable era ever.
In the end, will we ever understand?
The release implies that Shigeru Miyamoto and Genyo Takeda will run the company in the interim.