Hideo Kojima, creator of the Metal Gear Solid series and the upcoming MGS 5 will be present at the Tokyo Game Show to present a gameplay demonstration of the aforementioned upcoming title. His presence at the event was made official in an announcement on the Japanese Kojima Productions website.
The gameplay on display at the Tokyo Game Show will be of the Ground Zeroes portion of the game, and furthermore, the triler shown at E3 will be released for the first time with Japanese voice overs. New footage is expected to surface at the event.
The demonstration of MGS 5 will take place at the PlayStation booth, making it highly likely that the game on display will be running on the PlayStation 4 or at least a PC configured to those specifications.
The Tokyo Game Show will take place on September 19 to 22 and the exact date and time of when the new videos will be published will appear on the Japanese MGS 5 website in due time.
Here's Kojima's own announcement of his appearance:
LA Studio opening event, VO & cap sessions, TGS..all are piled up. Gotta work on 1 by 1. Unlike always I was able to get some rest on plane.
— HIDEO_KOJIMA (@HIDEO_KOJIMA_EN) September 12, 2013