Kamen Rider

Eiga no Osomatsu-san x Heisei Kamen Rider (えいがのおそ松さん×平成仮面ライダー) is a collaboration between Eiga no Osomatsu-san and tokusatsu franchise Kamen Rider that features the sextuplets dressed as various riders. This collaboration was made to promote the release of both *Eiga no Osomatsu-san* and the *Kamen Rider Heisei Generations FOREVER* movies.

Each of the sextuplets' corresponding riders are the following:

* Osomatsu - Kamen Rider Den-O (仮面ライダー電王)
* Karamatsu - Kamen Rider Build (仮面ライダービルド)
* Choromatsu - Kamen Rider Double (仮面ライダーＷ［ダブル］)
* Ichimatsu - Kamen Rider Zi-O (仮面ライダージオウ)
* Jyushimatsu - Kamen Rider Kuuga (仮面ライダークウガ)
* Todomatsu - Kamen Rider Decade (仮面ライダーディケイド)

Overview
The collaboration started with a series of promotional images of both series referencing each others' movie posters. The first set of posters were released on December 28, 2018 and the second set on February 12, 2019. Additionally, another image featuring cha Kintaros, Urataros, Momotaros, and Ryutaros doing Iyami's famous "Sheeeh" pose was released on the same day.

Later on May 17, 2019, a collaboration shop called "Eiga no Osomatsu-san x Heisei Kamen Rider Collab Shop: Presented by Matsunoichi" (えいがのおそ松さん×平成仮面ライダー コラボSHOP Presented by Matsunoichi) was announced. With this announcement revealed additional designs made of the sextuplets' high school counterparts, who were also dressed as Kamen riders. The merchandise sold featuring all of the collaboration's designs included badges, keychains, acrylic stands, mirrors, and T-shirts. For every 3000 yen spent on merchandise, fans could participate in mini meet and greet events with the sextuplets', the high school sextuplets' and Kamen Rider mascots on June 30, 2019. Any number of entry allowed fans to meet the Kamen Rider mascots, but only odd numbered entries allowed a session the adult sextuplets, while the even numbered granted a session with the high school sextuplets.

Additionally, a collaboration café was also held, which featured menu items based on characters from both franchises. The menu included yakiniku, sea food curry, parfaits, omelette rice, shaved ice, sweet omelettes, pancakes, and various drinks with two different drinks on each side of the container for each respective franchise's character. For every menu item purchased, a randomly chosen sticker was also included.

The collaboration was announced on December 28, 2018 and the collaboration shop and café ran from June 6 to June 30, 2019 at Tokyo Skytree and Tokyo Solamachi.

Trivia
* Fujio Akatsuka was roommates and friends with Shotaro Ishinomori, the creator of several manga that would eventually become part of the Kamen Rider franchise.
* Ryutaros, one of the additional characters from Kamen Rider featured in the collaboration, shares a voice actor with Iyami.

Gallery
Kamen Rider - Main Image (Sextuplets)Kamen Rider - Main Image (Riders)Kamen Rider - EIga no Osomatsu-san Movie PostersKamen Rider - Imagin Sheh ImageKamen Rider - Adult Sextuplets & 18matsu Sextuplets DesignsKamen Rider Badges (Sextuplets)Kamen Rider Keychains (Sextuplets)Kamen Rider Acrylic Stands (Sextuplets)Kamen Rider Badges (Imagin)Kamen Rider Acrylic Stands (Imagin)Kamen Rider Keychains (Imagin)Kamen Rider Movie Poster BadgesKamen Rider Badges (18matsu)Kamen Rider - Acrylic Stands (18matsu)Kamen Rider - MirrorKamen Rider - T-ShirtKamen Rider MenuKamen Rider InteriorKamen Rider Meet & Greet Mascots - Photo

General References:

1. ↑ https://kamenrider.fandom.com/wiki/Matsuno\_Sextuplets
2. ↑ https://kamenrider.fandom.com/wiki/Category:Imagin
3. ↑ https://lovetokusatsu.com/2019/06/18/mangaka-tetsuya-chiba-recalls-friendship-at-ishinomori-exhibit/

Gallery Image Sources:

1. https://twitter.com/osomatsu\_movie/status/1078485689543446529
2. https://twitter.com/hkr20\_official/status/1078485724511399936
3. https://twitter.com/HKR20\_official/status/1095155558620033025
4. https://twitter.com/HKR20\_official/status/1095156290282758144
5. https://twitter.com/OSO\_matsunoichi/status/1134021931772989440
6. https://tree-village.jp/news/013940.html
7. https://osomatsusan-movie.com/news/detail.php?id=1073264
8. https://osomatsusan-movie.com/news/detail.php?id=1069883
9. https://www.animate-onlineshop.jp/products/detail.php?product\_id=1753344
10. https://www.animate-onlineshop.jp/products/detail.php?product\_id=1753345
11. https://twitter.com/osomatsu3\_goods/status/1260871226924253184/
12. https://www.animate-onlineshop.jp/products/detail.php?product\_id=1753355
13. https://twitter.com/OSO\_matsunoichi/status/1136259339537096704
14. https://twitter.com/HKR20\_official/status/1146705412286107649