Ben 10 X Kamen Rider -Heroes United-

Ben 10 X Kamen Rider -Heroes United- is a Japanese tokusatsu anime based on Kamen Rider and Ben 10, being the crossover series in the Reiwa period, aired in January 2020. This is set after Date A Live, the 10 Raizen High School students (later in more than 10) becomes Kamen Rider with Ben 10 Alien motif. This anime was illustrated by Asabuki Mari, in collaboration with Cartoon Network Japan.

Story
Rin Momosaki is a 17 year old orphaned rich girl who lives alone in her apartment, after her parents has died in car accident 10 years ago. She is Raizen High School Class 3-1 student, along with her boyfriend, Vicky Zheng. While she almost being robbed while walking to her school, she is saved by the 10 teenage aliens in human form, who become 10 Alien Riders, Ben 10 alien-motifed Kamen Rider. And now, the Riders becomes a Rin and Vicky's classmates.

Alien Riders/Ten Master Clan Club

 * 1) Chise Ichijou/Kamen Rider Heatblast
 * 2) Takeru Futatsugi/Kamen Rider Diamondhead
 * 3) Akemi Mitsuya/Kamen Rider XLR8
 * 4) Masaru Yotsuba/Kamen Rider Grey Matter
 * 5) Kouji Itsuwa/Kamen Rider Four Arms
 * 6) Itsuki Mutsuzuka/Kamen Rider Stinkfly
 * 7) Uzagi Saegusa/Kamen Rider Upgrade
 * 8) Kazuto Yatsushiro/Kamen Rider Cannonbolt
 * 9) Yui Kudou/Kamen Rider Wildvine
 * 10) Arita Jumonji/Kamen Rider Overflow

Alien Riders Allies

 * Rin Momosaki
 * Vicky Zheng

Raizen High School Class 3-1

 * Hiroto Tonomachi
 * Ai Yamabuki
 * Mai Hazakura
 * Mii Fujibakama
 * Kevin Qian
 * Shinichirou Chosikiwa
 * Yashiro Watagi
 * Jun Xiaowa
 * Huang Kyung-soo
 * Iwan Wijaya
 * Angelina Junichiro Stevenson
 * Tamae Okamine

Global Special Police Organization

 * Keiichiro Asaka/Patranger 1
 * Sakuya Hikawa/Patranger 2
 * Tsukasa Myoujin/Patranger 3
 * Noël Takao/Patranger X
 * Director Samuel Hilltop
 * Jim Carter

Stile Cafe

 * Maika Sakuranomiya
 * Kaho Hinata
 * Mafuyu Hoshikawa
 * Miu Amano
 * Hideri Kanzaki
 * Akizuki Kouyou
 * Dino

Veteran Riders

 * Sento Kiryu/Kamen Rider Build
 * Emu Hojo/Kamen Rider Ex-Aid
 * Gentaro Kisaragi/Kamen Rider Fourze
 * Takumi Inui/Kamen Rider Faiz
 * Haruto Soma/Kamen Rider Wizard
 * Eiji Hino/Kamen Rider OOO
 * Kouta Kazuraba/Kamen Rider Gaim
 * Takeru Tenkuji/Kamen Rider Ghost
 * Tsukasa Kadoya/Kamen Rider Decade
 * Shinji Kido/Kamen Rider Ryuki
 * Kazuma Kenzaki/Kamen Rider Blade
 * Shouichi Tsugami/Kamen Rider Agito
 * Hitoshi Hidaka/Kamen Rider Hibiki
 * Wataru Kurenai/Kamen Rider Kiva
 * Souji Tendou/Kamen Rider Kabuto
 * Ryotaro Nogami/Kamen Rider Den-O
 * Shinnosuke Tomari/Kamen Rider Drive
 * Yusuke Godai/Kamen Rider Kuuga
 * Akiko Narumi/Kamen Rider Cyclone
 * Shotaro Hidari/Kamen Rider Joker
 * Takeshi Hongo/Kamen Rider Ichigo
 * Kohtaro Minami/Kamen Rider Black RZ

Villains

 * Albedo
 * Hanten Riders