Direct quote 2009-04-15
“I had the idea of bringing the game to the iPhone originally, but I wasn't the designer of the game. I was more of a producer, guiding the team members.”
What it documents
In 2009 Kojima said the idea of bringing Metal Gear Solid to the iPhone was his, but that he was not the game’s designer and acted more as a producer guiding the team. He explained he wanted to experiment with MGS Touch to observe user reaction, because someone who buys an iPhone does not necessarily buy it to play in the way a person who buys a DS or a PSP does, and he wanted to understand how to bring his core games to a lighter audience.
Source
Video Games Daily / Kikizo, 2009-04-15 (page 2 of 3). View source ↗
“I wanted to experiment with MGS Touch and investigate the user reaction, in order to understand how we can implement our core games for a lighter audience.”