I spent my first 3 days alone in my usual spot. Asakusa is a district in the Taito ward of the Metropolis of Tokyo. I discovered a few good hostels here during a trip in 2009. Hotels in Tokyo are expensive, usually around $300 a night. While I can budget, save, and afford such accommodations, I prefer staying at Hostels for 1/10th the price and avoid the opportunity cost. Less money spent on lodging means more money for exploring and experiences.
My first stop, a bit of a tourist trap, is almost always the Sensō-ji (金龍山浅草寺) temple, one of the oldest ones in Tokyo. Why this place? It is really beautiful architecture as well as some fun history and shopping.
After walking around the temple for a little while, I continued down to the Sumida river.