An energy harvesting device for harvesting energy of a wave, motion of the wave resulting in pitch, sway, yaw, surge, roll, and heave movement, the energy harvesting device comprising: a housing assembly; an input shaft operably coupled to a first bevel gear via a first one way bearing transmitting rotational force in a first direction, the input shaft operably coupled to a second bevel gear via a second one way bearing transmitting rotational force in a second direction, the second direction being opposite the first direction, the input shaft being configured to move in response to movement of the wave; a heave pitch shaft rotatably coupled to the housing assembly, the heave pitch shaft freely supporting a third bevel gear operably meshing with the first bevel gear and the second bevel gear, the heave pitch shaft freely supporting a fourth bevel gear operably meshing with the first bevel gear and the second bevel gear, the heave pitch shaft freely supporting a fifth bevel gear fixedly coupled with the fourth bevel gear for rotation therewith, the heave pitch shaft operably coupled to a sixth bevel gear via a third one way bearing; an intermediary heave pitch roll surge shaft rotatably coupled to the housing assembly, the intermediary heave pitch roll surge shaft having a seventh bevel gear and a first spur gear fixedly coupled therewith, the seventh bevel gear operably meshing with the fifth bevel gear and the sixth bevel gear and rotating the intermediary heave pitch roll surge shaft and the first spur gear in response thereto; a sway yaw shaft fixedly coupled to the housing assembly; and an output shaft coaxially disposed about the sway yaw shaft, the output shaft having a second spur gear fixedly coupled thereto operably meshing with the first spur gear of the intermediary heave pitch roll surge shaft, the output shaft being operably coupled to the sway yaw shaft for unidirectional rotational motion in response to multidi-rection input from the sway yaw shaft, wherein multiaxial translational and rotational motion of the input shaft and the housing assembly is converted to unidirectional rotational motion of the output shaft. a housing assembly; an input shaft operably coupled to a first bevel gear via a first one way bearing transmitting rotational force in a first direction, the input shaft operably coupled to a second bevel gear via a second one way bearing transmitting rotational force in a second direction, the second direction being opposite the first direction, the input shaft being configured to move in response to movement of the wave; a heave pitch shaft rotatably coupled to the housing assembly, the heave pitch shaft freely supporting a third bevel gear operably meshing with the first bevel gear and the second bevel gear, the heave pitch shaft freely supporting a fourth bevel gear operably meshing with the first bevel gear and the second bevel gear, the heave pitch shaft freely supporting a fifth bevel gear fixedly coupled with the fourth bevel gear for rotation therewith, the heave pitch shaft operably coupled to a sixth bevel gear via a third one way bearing; an intermediary heave pitch roll surge shaft rotatably coupled to the housing assembly, the intermediary heave pitch roll surge shaft having a seventh bevel gear and a first spur gear fixedly coupled therewith, the seventh bevel gear operably meshing with the fifth bevel gear and the sixth bevel gear and rotating the intermediary heave pitch roll surge shaft and the first spur gear in response thereto; a sway yaw shaft fixedly coupled to the housing assembly; and an output shaft coaxially disposed about the sway yaw shaft, the output shaft having a second spur gear fixedly coupled thereto operably meshing with the first spur gear of the intermediary heave pitch roll surge shaft, the output shaft being operably coupled to the sway yaw shaft for unidirectional rotational motion in response to multidi-rection input from the sway yaw shaft, wherein multiaxial translational and rotational motion of the input shaft and the housing assembly is converted to unidirectional rotational motion of the output shaft.