(UPDATE: IWJ's channels don't seem to be working. Go to Nico Nico Video.
You can wait for IWJ's all 9 screens to go on air, here.
IWJ's USTREAM channels on the protest at the Prime Minister's Official Residence in Tokyo for Friday July 13th, 2012:
Ch1—Yasumi Iwakami in front of the National Diet
Ch3—Aerial video or video from the car
Ch4—Bird's-eye view from a nearby building
Ch5—Front line at the PM Official Residence
Ch6—between the No.2 stage and the Ministry of Finance
Ch7—between the PM Official Residence and the Ministry of Finance
Ch8—Tents at the Ministry of Economy - Ministry of Education - Ministry of Economy
Ch9—In front of TEPCO, in front of KEPCO
Tokyo Ch1—Family area
Here's Channel 5. People holding white balloons must have gotten from Yasuo Tanaka, the head of New Party Nippon.
Live video from your iPhone using Ustream
You can also go to Nico Nico Video, netcasting the event for free for both members and non-members, here. You see the policemen on the other side (road-side) of the metal fences they installed.