Otemachi is the center of business in Japan. The Imperial Palace lays beside Tokyo Station surrounded by skyscrapers. You can take the JR Yamanote Line and go from there to Ueno. There, you can enjoy Ueno park, which has multiple art museums, zoos etc., and Ameyoko, which is a busy market street where you can buy various products such as clothes, bags, cosmetics, fresh fish, dried food and spices. Then, you can go to Akihabara, which is the home of otaku culture in Japan, although it originally was an electronics center.