This protest began at the Hibiya community center in Hibiya park. The park is located near the Imperial Place in Tokyo's Chiyoda ward which is home to the Financial District , Diet and Central Government offices.
Protests took place in Roppongi near the offices of Goldman Sac and in Shinjuku near the Tokyo Metropolitan Government building.
Here's something to remember that income inequality in Asia is nowhere near what it is in America and Europe. Yet protests occurred in Seoul, Tokyo and Taipei where anger against the moneyed class doesn't usually exist.
Abut that second picture: The boy holding the placard couldn't be more than 8 years old he was there with his mother and his two younger brothers.