What is the purpose of one-shot manga?


One-shot manga usually only consist of one chapter, so what is their purpose?
Is it mainly for promotion, filler or contest? And do they have their own
media (like a magazine that only consists of one-shot or something)?




> Manga magazines usually have many series running concurrently with
> approximately 20–40 pages allocated to each series per issue. Other
> magazines such as the anime fandom magazine Newtype featured single chapters
> within their monthly periodicals. Other magazines like Nakayoshi feature
> many stories written by many different artists; these magazines, or
> "anthology magazines", as they are also known (colloquially "phone books"),
> are usually printed on low-quality newsprint and can be anywhere from 200 to
> more than 850 pages thick. Manga magazines also contain one-shot comics and
> various four-panel yonkoma (equivalent to comic strips). Manga series can
> run for many years if they are successful. **Manga artists sometimes start
> out with a few "one-shot" manga projects just to try to get their name out.
> If these are successful and receive good reviews, they are continued.
> Magazines often have a short life.[50]**

[Source](http://en.wikipedia.org/wiki/Manga)

* * *

> One-shot manga tells its entire story in 15-60 pages, usually written for
> contests, and sometimes later developed into a full-length manga series
> (much like a television pilot). Many popular manga series began as one-shot
> stories, including Dragon Ball, Fist of the North Star, Naruto, Bleach, One
> Piece, Berserk, Kinnikuman and Death Note, among others. Some noted manga
> authors, such as Akira Toriyama and Rumiko Takahashi, have worked on
> numerous one-shot stories in addition to their serialized works. Rising
> Stars of Manga was an annual competition for original English-language one-
> shot manga, many of which have gone on to become full-length manga series.

[Source](http://en.wikipedia.org/wiki/One-shot_%28comics%29)

Note: Emphasis mine.




> Manga magazines usually have many series running concurrently with
> approximately 20–40 pages allocated to each series per issue. Other
> magazines such as the anime fandom magazine Newtype featured single chapters
> within their monthly periodicals. Other magazines like Nakayoshi feature
> many stories written by many different artists; these magazines, or
> "anthology magazines", as they are also known (colloquially "phone books"),
> are usually printed on low-quality newsprint and can be anywhere from 200 to
> more than 850 pages thick. Manga magazines also contain one-shot comics and
> various four-panel yonkoma (equivalent to comic strips). Manga series can
> run for many years if they are successful. **Manga artists sometimes start
> out with a few "one-shot" manga projects just to try to get their name out.
> If these are successful and receive good reviews, they are continued.
> Magazines often have a short life.[50]**

[Source](http://en.wikipedia.org/wiki/Manga)

* * *

> One-shot manga tells its entire story in 15-60 pages, usually written for
> contests, and sometimes later developed into a full-length manga series
> (much like a television pilot). Many popular manga series began as one-shot
> stories, including Dragon Ball, Fist of the North Star, Naruto, Bleach, One
> Piece, Berserk, Kinnikuman and Death Note, among others. Some noted manga
> authors, such as Akira Toriyama and Rumiko Takahashi, have worked on
> numerous one-shot stories in addition to their serialized works. Rising
> Stars of Manga was an annual competition for original English-language one-
> shot manga, many of which have gone on to become full-length manga series.

[Source](http://en.wikipedia.org/wiki/One-shot_%28comics%29)

Note: Emphasis mine.

