Bloomberg reported Sony has halted production and evacuated six factories in northeastern Japan.
According to AP, Canon also halted production in some of their plants. Only 12 employees suffered minor injuries.
Nikon (factories located in Sendai) reported no injured employees, factories not significantly affected.
Panasonic also reported minor injuries and small damage to buildings
I could not find any media coverage for FujiFilm, but they also have factories located in Sendai - the area with the most damage. Update: Fuji also halted the production of the X100.