Sony typically has the largest presence at Tokyo Game Show, and this list of titles they're bringing proves it. I love that they're even bringing indies like Octodad and Contrast with their heavy hitters. Here's the full list.
PS4 games: Contrast, Octodad: Dadliest Catch, Blacklight: Retribution, FIFA 14, Deep Down, Strider, Dynasty Warriors 7, Driveclub, Hohokum, Killzone: Shadow Fall, Knac, Playroom, Resogun, Wolfenstein: The New Order, and Assassin's Creed IV: Black Flag.
PS Vita: Alchemist of Arland, Dynasty Wrriors 7, Orochi 2 Ultimate Warriors, Jikkyou Powerful Pro Baseball 2013, Dangan refut 1.2 Reload, Hatsune Miku-Project DIVA-F 2nd, Song set 575, Soul Sacrifice Delta, Tearaway, Trajectory of the Legend of Heroes Blende, 2 Yuke, God Eater 2, Gundam Breaker, and The Movie Magical Girl Madoka.
Note that the Vita TV will be shown off as well, with Dangan, Soul Sacrifice Delta, and God Eater 2 all demoed on it. And finally, here's the PlayStation 3 lineup:
Note that I went through Chrome's translate feature to find out what half the games were on this page. So some of the these game names may be wrong. Blame Dale North if that's the case.
Along with all these games, Sony will have several stage demos going on during TGS. The most notable one being that Kojima Productions will be sharing new gameplay footage of Metal Gear Solid: Ground Zeroes.