Nekketsu Manga Konjō-kai
The Nekketsu Manga Konjō-kai (熱血漫画根性会 Hot-Blooded Manga Guts Society), also known under its abbreviation Nemakon (ねまこん Nemakon), is the manga research and creation club at the Ekoda Campus (Faculty of Fine Arts) of Nihon University. Gosho Aoyama and Yutaka Abe were members of it for a while during the eighties, who probably are some of their most famous past members, releasing some dōjin and commercially released manga works, as well as at least two animations. Pretty much all of these products have become highly obscure and are extremely difficult to come by. Abe was Aoyama's senior back then, but is an assistant of his and works on the Special manga, the movie manga and the novel illustrations nowadays.
100% Tantei Monogatari 
From 1986 to 1987, the first three chapters of this seven-part series were created, during which Gosho Aoyama assisted Yutaka Abe and which were published in the Shōjo manga magazine Missy. The story takes place at the Ekoda High School most of the time and Kaito Kuroba, as well as Aoko Nakamori got a small guest appearance in the third chapter.
100% Tantei Monogatari promo animation
In 1986, an animation was created under the direction of Gosho Aoyama and animated by Yutaka Abe, which served as a promo for Abe's manga 100% Tantei Monogatari. "Say Yes!" by Momoko Kikuchi was used as background music, who served as a template for the protagonist Momoko Aoyama and was Aoyama's favorite pop idol at the time. Abe himself said that he can't release this and the other animation because copyrighted music was used without authorization, while the animations were made to be synchronous with it.
Kaito 1/8?! (快斗1/8?! Kaito 1/8?!) is the first of two small volumes about Magic Kaito, which Gosho Aoyama published independently of Shōnen Sunday on August 8th, 1987. It contains panels from the manga and some drawings that were specially created for this booklet.
Kaito 8/2 (快斗8/2 Kaito 8/2) is the second of two small volumes about Magic Kaito, which Gosho Aoyama published independently of Shōnen Sunday on December 26th, 1987. It contains panels from the manga and some drawings that were specially created for this booklet.
Mococo (モココ Mokoko) is a small collection of short stories that Gosho Aoyama drew during his university days, self-published in 1986, and which have not yet been republished anywhere else. Two of the titles it contains are HOLE and MAIL RUNNER, with the latter one apparently a science fiction story about a futuristic postman. Not much more is known about it, the few surviving copies are in the price range of up to 120,000 yen at online retailers (about 1,088 US Dollars in March 2021).
Pori Pori 3 - Peppermint Milk Special 
WALK MAN is another short story by Gosho Aoyama that was published in Yutaka Abe's fanzine Bishōjo Shōkōgun (美少女症候群 Pretty Girl Syndrome). Apparently some of Aoyama's friends and fellow students, besides himself, enjoy guest roles in this story in which they are threatened by a gigantic dragon. A text about Aoyama's dōjin Mococo is featured on a bonus page.
Commercial animation with unknown title
Another animation directed by Gosho Aoyama and animated by Yutaka Abe was created for unknown advertising purposes. "Jikan no Kuni no Alice" by Seiko Matsuda was used as background music. According to Abe himself, he cannot publish the animation because they've used this copyrighted music without authorization, while the animations were made to be synchronous with it.
- Nekketsu Manga Konjō-kai on Twitter
- ^ 阿部ゆたか#青山剛昌とのエピソード
- ^ a b https://twitter.com/Abe_Yutaka/status/1274714815005483012
- ^ a b https://twitter.com/Abe_Yutaka/status/1363454140270043137
- ^ https://twitter.com/cdjtype100/status/485737611189698560
- ^ https://twitter.com/kudan2002/status/1265989308244090881
- ^ https://twitter.com/junyathesphere/status/1266379819677171714
- ^ https://twitter.com/toto_6w/status/695938674341466112
- ^ https://twitter.com/abemasa3/status/1274373679502094342
|Self-published||Mococo (HOLE • MAIL RUNNER) (1986) • WALK MAN (1986)|
|Competition entry||Nonchalant Lupin (1987)|
|Shōnen Sunday||Wait For Me (1986) • The Santa Claus of Summer (1987) • Sunday 19 Show - The Wandering Red Butterfly (1988) • Play It Again (1988) • Excalibur (1988) • K∀ITO (1989)|
|Young Sunday||Tell Me A Lie (2007)|