From the Ginza Line Asakusa Station, take Exit 1 and walk straight, keeping Tokyo Skytree behind you. After one minute, you will see the Kaminarimon Gate to your right; this marks the entrance to Nakamise shopping street. Follow the line of shops until you reach Sensoji Temple.
From Shinjuku Station to Asakusa Station:
Take the Chuo Line to Kanda Station, change trains to the Ginza Line to Asakusa Station (21 minutes, ¥340)From Tokyo Station to Asakusa Station:
Take the Yamanote Line to Kanda Station, change trains to the Ginza Line to Asakusa Station (12 minutes, ¥310)