Named in honor of Koichi Yoshii (b. 1914), retired postmaster and amateur astronomer. He was a pioneer in meteor photography in Japan. In the 1930s, when the sensitivity of photographic emulsion was still very low, he succeeded in photographing 86 meteors with his homemade camera. Name proposed by the discoverers following a suggestion by A. Fujii, Y. Yabu and T. Sato.