Claim: Although he was an amateur astronomer Kōyō Kawanishi discovered thirteen minor planets, including Nada, Nomura, and Shoyo.
Evidence: Minor planets discovered: 13 4106 Nada 6559 Nomura 14873 Shoyo Kōyō Kawanishi (川西 浩陽, Kawanishi Kōyō, born January 18, 1959) is a Japanese dentist, amateur astronomer and discoverer of 13 minor planets.