correct me if I'm wrong, but the only thing Kojima has directed outside of metal gear is some very old adventure games. hope his team has some experienced people working on the gameplay.
Nope.
Snatcher
Policenauts (which let you fondle each girls boobs) <---Japan only, but got a PSX fan translation
Metal Gear series (minus 2: Snakes Revenge)
Metal Gear Solid series (minus AC!D, Ghost Babble, Portable Ops, which he oversaw all the side-games that aren't Peace Walker)
Zone of the Enders
Zone of the Enders 2
Boktai: The Sun Is in Your Hand
Boktai 2: Solar Boy Django
Shin Bokura no Taiyō: Gyakushū no Sabata (also known as Boktai 3: Sabata's Counterattack) <---Japan only
Bokura no Taiyō: Django & Sabata, released outside Japan under the title Lunar Knights
Silent HillsTwo of those are Adventure Titles if you count "visual novels" as adventure titles.