Following the fleeing Taira from Ichi_no_Tani, on their way to Yashima, Minamoto no Noriyori engaged and defeated his enemies in battle at Kojima. The attack was led by Sasaki Moritsuna, who swam his horse across a narrow strait betwen Kojima and the mainland of Honshu.
References
Turnbull, Stephen (1998). 'The Samurai Sourcebook'. London: Cassell & Co.
Nevertheless Kojima was confident he'll surpass his previous efforts: "To overcome myself is quite easy, so I'll probably just have to do it again for Metal Gear Solid 4".
Curiously, Kojima still refuses to rule out bringing the Metal Gear franchise to other formats, despite having no specific plans yet, although he did imply that "everyone in Japan has a good feeling" about Xbox 360 development, and Microsoft Japan is supporting the community well.
Intriguingly, Kojima sees this implementation of the online mode as a "trial" for how well online features are accepted for the series, suggesting that feedback will play a role in the development of Metal Gear Solid 4.
Kojima, who has created a behemoth of a game that has leap-frogged every other next-generation game in looks, complexity, technical design, and detail for the PS2 -- or any console for that matter -- must get down to business and finish his opus.
Hideo Kojima: Last year at E3 we showed the trailer to give you an idea of where we were headed and then the question was what will it feel like when it is playable.
Hideo Kojima: The theme of the previous game and the theme of this game work together, they make up this one big theme that I'm trying to give to everyone and the three Snakes are like actors trying to present that theme.