From 2008, we have developed a scheme of short X-ray pulse generation by head-tail oscillation with a vertical kicker in SPring-8 storage ring in order to fulfill the demand of shorter pulse undulator radiation for the time resolved experiment. The developed system generates a vertical kick of 0.143 mrad and pulse width as short as 2.4 μs with 200 Hz repetition. With this system we successfully observed a bunch profile which tilted 362 mrad by visible light streak camera measurement for bending magnet light source. The expected tilt angle on the undulator position is 163 mrad, whose tilt angle has a capability of generating the 630 fs (RMS) without the beam spread effect after 50 μm slitting. As a preliminary test, we observed the reduction of the X-ray pulse duration as a function of the tilt angle by X-ray streak camera for the undulator radiation. From this result, we observed the saturation of the minimum short pulse duration at 4.5±2.1 ps (RMS) by 50 μm slitting, which almost corresponds to the detection limit of the X-ray streak camera, in the tilt angle region larger than 40 mrad.