Stardom 9th Anniversary was a professional wrestling event promoted by World Wonder Ring Stardom, held on January 19, 2020 at Korakuen Hall in Tokyo, Japan. In the main event, Mayu Iwatani defended the World of Stardom Championship against Momo Watanabe.
| Actor | Role |
|---|---|
 Mayu IwataniMayu Iwatani | Mayu Iwatani |
 Momo WatanabeMomo Watanabe | Momo Watanabe |
 Arisa HoshikiArisa Hoshiki | Arisa Hoshiki |
 Utami HayashishitaUtami Hayashishita | Utami Hayashishita |
 Hana KimuraHana Kimura | Hana Kimura |
 Kaori YoneyamaDeath Yama-san | Death Yama-san |
 Leyla HirschLeyla Hirsch | Leyla Hirsch |
 Eimi Gloria MatsudoGiulia | Giulia |
 MaikaMaika | Maika |
 Syuri KondōSyuri | Syuri |
 Kyōna YanoJungle Kyona | Jungle Kyona |
 Konami TakemotoKonami | Konami |
 Beatrice St. Clere TerryBea Priestley | Bea Priestley |
 Paige WoodingJamie Hayter | Jamie Hayter |
 Yū IshinoKagetsu | Kagetsu |
 Yuria TauchiTam Nakano | Tam Nakano |
 Saya IidaSaya Iida | Saya Iida |
 Saya KamitaniSaya Kamitani | Saya Kamitani |
 Itsuki HoshinoItsuki Hoshino | Itsuki Hoshino |
 Natsuko TōraNatsuko Tora | Natsuko Tora |
 Natsuki UrabeNatsu Sumire | Natsu Sumire |
 Saki KashimaSaki Kashima | Saki Kashima |
 AzumiAZM | AZM |
 Starlight KidStarlight Kid | Starlight Kid |
 Zoey SkyeZoey Skye | Zoey Skye |
 Leo OnozakiLeo Onozaki | Leo Onozaki |
 HinaHina | Hina |
 RuakaRuaka | Ruaka |
 RinaRina | Rina |