Microtremor data that was an actual slight ground motion, was acquired widespread for Konan city, Kochi prefecture, and H/V spectral ratio was calcurated to utilize for accurate shaking hazard maps. At first, it was found that the predominant frequency and the corresponding peak value of H/V spectral ratio was not enough related to AVS30, ARV(an amplification rate) and so on based on the geomorphologic classification map. And it was shown that the predominant frequency of microtremor H/V spectral ratio corresponded to the transfer function at the investigated ground. We suggested and demonstrated a method to interpolate the transfer function at the site without investigation data using the microtremor H/V spectral ratio.