Kōyō Kawanishi

{{Short description|Japanese dentist and amateur astronomer}}

class="wikitable collapsible" align="right" style="margin: 1em; margin-top: 0; font-size:89%" |+ Minor planets discovered: 13

4106 Nada{{ref label|codisc|1

} || March 6, 1989

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| 4797 Ako{{ref label|codisc|1|}} || September 30, 1989

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| 5401 Minamioda{{ref label|codisc|1|}} || March 6, 1989

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| 5685 Sanenobufukui{{ref label|codisc|1|}} || December 8, 1990

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| 5737 Itoh{{ref label|codisc|1|}} || September 30, 1989

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| 5872 Sugano{{ref label|codisc|1|}} || September 30, 1989

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| 6155 Yokosugano{{ref label|codisc|1|}} || November 11, 1990

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| 6557 Yokonomura{{ref label|codisc|1|}} || November 11, 1990

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| 6559 Nomura{{ref label|codisc|2|}} || May 3, 1991

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| 7178 Ikuookamoto{{ref label|codisc|1|}} || November 11, 1990

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| 9580 Tarumi{{ref label|codisc|1|}} || October 4, 1989

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| 10318 Sumaura{{ref label|codisc|1|}} || October 15, 1990

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| 14873 Shoyo{{ref label|codisc|2|}} || October 28, 1990

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| colspan=2 style="font-size: smaller;" |

• {{note label|codisc|1|}} co-discovered with T. Nomura
• {{note label|codisc|2|}} co-discovered with M. Sugano

|}

{{nihongo|Kōyō Kawanishi|川西 浩陽|Kawanishi Kōyō|extra=born January 18, 1959}} is a Japanese dentist, amateur astronomer and discoverer of 13 minor planets.

He lives in the city of Akō in the Hyōgo Prefecture, Japan, where his private Minami-Oda Observatory ({{small|374}}) is located. At the observatory, he observes comets and minor planets using his home-made 0.20-m reflector telescope together with his wife Kumi and daughter Saki. Familiar with electronics and mechanics, he has also developed his own CCD instrumentation.

The asteroid 5591 Koyo, discovered by Japanese astronomer Takeshi Urata, was named in his honour.