Between her amateur work and winning the GanGan Award with Stray Dog, Hiromu Arakawa created a number of yonkoma for Gamest Magazine under the pen name Edmund Arakawa. They parody many of the games featured in the magazine, and although she used a psudonym, the style is distinctly hers.

Totsugeki Tonari no Enikksu are a series of one-page comics that act as a behind the scenes look at Arakawa's days as Eito Hiroyuki's assistant working on Mahoujin Guru Guru. They are similar to the cow shed diaries where her assistants each get to showcase their talents individually.

Kono Sora no Shita de seems to be a standalone chapter within a series of manga adaptations of a PlayStation game called Tokyo Majin Gakuen Sotonori-chou. It involves a group of high school students learned in the field of martial arts defending themselves and their town against their zombi-fied classmates and other grisly monsters.

Washi no Natsu Yasumi is a special trio of yonkoma that Hiromu Arakawa did for the comic magazine, Zerosum. It follows a young teenage girl on a series of summer days she experiences.

When word got out that Arakawa and Taishi Mori were fans of each other's works, they came together to create gag pages for each other that were included in the next volume of their current series publications. Hers was published in Idejuu! and his was published in Fullmetal Alchemist.

Arakawa created a yonkoma for Yahoo! Japan's 10th Anniversary online. It depicts Edward Elric using the internet to learn more about the Philosopher's Stone. He is suddenly greeted by the Yahoo Fairy who embarrasses him by exposing his past search topics including overcoming aversions to milk, and increasing ones height.

For the 25th anniversary of Big Comic Spirits which Rumiko Takahashi's Maison Ikkoku began it's run in at the start of the publication, Arakawa created a two page spread detailing her fondness for the manga of her youth. She describes how the journey she went on with the characters in Maison Ikkoku inspired her, even as a young girl.

When the popularity of Yashichiro Takahashi's Shakugan no Shana novels led to the creation of a manga series, as well as an anime series, Arakawa drew up a two page piece for the story's guidebook congratulating her friend on the success of his stories.

For Kochikame's 30th anniversary, a number of manga artists created congratulatory pieces for a special issue of Weekly Shounen Jump commending Osamu Akimoto on his lengthy run. Pages were drawn by over 70 fellow manga-ka, from Obata Ken (Death Note), to Masashi Kishimoto (Naruto), to Yudetamago (Kinnikuman), and even Akira Toriyama (Dragonball)! Hiromu Arakawa's page features Edward and Alphonse Elric sitting with Officer Ryotsu as he tries to goad them into transmuting him some gold, even though it's illegal.

A series of autobiographical stories, these shorts seem to chronicle Hiromu Arakawa's childhood growing up on a farm, and how her rural background plays into her career as a manga artist.

In order to justify fans buying yet another reprint of this classic series, each of the 34 volumes features a note from a distinguished manga-ka accompanied by their own interpretation of the main character, who has become an icon of Japanese culture, Lum. Other artists featured included Mine Yoshizaki (Sgt. Frog), Junji Ito (Uzumaki), Eiji Nonaka (Cromartie High School), and Mitsuru Adachi (Touch), just to name a few. Arakawa's Lum appeared in Volume 16. Click the image to see the full drawing.

The ending of each episode of this strange series featured a card illustrated by a famous manga-ka. Hiromu Arakawa's appeared in episode eight. Other manga-ka to contribute included the creator of Sayonara Zetsubou Sensei himself, Kouji Kumeta, Akimine Kamijyo (Samurai Deeper Kyo), Kouji Seo (Suzuka), and even the famous Rumiko Takahashi (Inuyasha)! Click the image to see the full drawing.