Yes, you are missing tons. But it all depends on your interests and what you want to prioritize. Ueno park and museums, Akihabara, Edo-Tokyo Museum, Kabuki Theater in Ginza (if that wasn't included in "Ginza"). Do yourself a favor and search through the endless, once-a-week threads with the same question or any guidebook or any web resource. "Things to do in Tokyo?" is just about the most common question asked by a first-time tourist. That and "Are there really used underwear vending machines?"