Start by visiting the Tsukiji Fish Market. See a busy market with lots of fresh seafood and also try foods you have never seen before. If you would like to, you can also enjoy a small breakfast.
Next head to the Meiji Jingu Shrine, one of the biggest in Tokyo. If you are lucky, you might see a traditional Japanese wedding. After the shrine, stroll around the Omotesando and Harajyuku shopping areas famous for teenage pop fashion. You can have lunch there or in Asakusa later.
In the afternoon, visit Asakusa where a big Sensoji Temple is located. There are many shops called Nakamise so you can enjoy shopping typical Japanese souvenirs. If you need more shopping after the tour, you can stay in Asakusa.