|This article is about a/an monstrous Rider in Kamen Rider Zi-O.|
This Another Den-O was first seen summoned by Hiryu alongside Another Agito and Another Gaim, to fight Sougo Tokiwa, Another Zi-O II rewritten their history multiple times to prevent them defeated by GrandZi-O.
Later Another Den-O was seen as a part of the Another Rider Army that defended Hiryu's castle from Sougo Tokiwa, Geiz Myokoin, Black Woz, and Tsukasa Kadoya. Another Den-O was destroyed by GrandZi-O's King Giri Giri Slash.
- ―Transformation announcement[src]
- Height: 190 cm.
- Weight: 87 kg.
- Summoned by: Hiryu Kakogawa
- Year of Origin: 2019.
- Position of year: Back of lower Left cloak.
- Name and Position: "DEN-O", Back of lower Right cloak.
- Unnamed sword: A sword with a buzz saw equipped on its hilt. It has a similar appearance to Kamen Rider Blade's Blay Rouzer.
- Ryotaro Nogami - Original Kamen Rider Den-O
- Den-OArmor - the result of using Den-O Ridewatch
- Ataru Hisanaga - First Another Den-O
- Takuya Endo - Second Another Den-O