Proper Japanese Title: ウルトラジャンプ
Ultra Jump first started in 1995 as a special issue of Weekly Young Jump, titled "Young Jump Cho Zokan: Ultra Jump" (ヤングジャンプ超増刊ウルトラジャンプ), some of the more well-known serials to run during this period include Agharta and Outlaw Star. During this time issues had sequential numbering rather than an annual reset like most manga magazines, and this lasted for thirty-four issues.
Then in 1999, it properly became an independent magazine and relaunched itself with the November issue of the year and began a monthly publication rate that it has consistently kept (one of the few Shueisha magazines to never change its release schedule).
Currently, Ultra Jump is (by a significant margin), the least popular of Shueisha's seinen magazines (aimed at adult males). Unsurprisingly, as a result, it mostly serializes much less successful manga, with a notable amount of its serializations being adaptations of other properties whether it be a trading card game, light novels, a web series or a Chinese manhua.
The magazine's promotion tends to revolve around a select few titles, instead of giving every new title an equal chance (like Weekly Shonen Jump does). Most serials never get the cover (or a single cover in the issue they debut) while a few titles get multiple covers a year. It is also much more common to get shorter works, including one-shots and miniseries, very rarely does a series last for more than fifty chapters.
Even a number of the longest-running titles in Ultra Jump didn't get their start in the magazine, instead getting transferred from other magazines or publishers (such as Hayate × Blade, JoJo's Bizarre Adventures, Bastard!!, La Vie en Doll, Jumbor and Future-Retro Hero Story).
Ultra Jump does have an online service (Ultra Jump Egg) that serializes other titles and the magazine itself often releases special promotional chapters of digital series in the Young Jump family.
Titles originally serialized in this magazine include: