Junpei Furuhata was on the organizational committee for the Tokyo Game Show back in 2005. Back then, the team decided to invite Satoru Iwata to host a keynote at the show. Iwata would be the main keynote for TGS that year, but little did he know it would be the only year he'd get to present.
In an interview for the Iwata-san book, Furuhata details what lead to the TGS team banning Iwata from future keynote speeches. You can check out the full translation, courtesy of NintendoSoup, below.

Back in the day, Nikkei BP was a joint sponsor of (Tokyo Game Show), so I was involved in the management of Tokyo Game Show at that time. It was 2005, and the Nintendo DS was selling well, so we decided to ask late Nintendo President Satoru Iwata to deliver a keynote speech. We wanted Nintendo to talk about the future of video games.
Of course, the first to deliver the keynote speech would be Nintendo, followed by Microsoft. I had to beg both companies to get on board.
As I was the presenter I received the presentation slides before the speech. But during that time, the speakers never rehearsed before the actual speech, as everyone knew the rough state of the video game industry.

And so the keynote speech began. Iwata-san abruptly announced the Wii (codenamed Revolution at that time). The audience gave a round of thunderous applause, and the foreigners whistled in excitement. On the other hand, the Japanese game media journalists literally froze, hahaha.
Although the game industry was...