Shock acceleration measurement is widely used in a variety of applications including air-bag control of automobiles and drop testing of mobile instruments, in which accelerometers are a key device to evaluate human safety or product reliability. However, vibration acceleration available in the calibration service of accelerometers has been limited to several hundreds of m/s² due to the performance of vibration exciters. Therefore, it is desired to establish a calibration service up to 10,000 m/s² to cover recent industrial demands. Here we have developed a shock acceleration calibration system to calibrate the sensitivity of accelerometers precisely. The developed calibration system can calibrate accelerometers with the expanded uncertainty (k=2) of less than 0.8 % in the range from 200 m/s² to 5,000 m/s².