Proper Japanese Title: 週刊少年ジャンプの増刊号
Quarterly specials for the series Weekly Shonen Jump, which began publication in the mid-80's. Though it featured one-shots in every special (often by creators who would go on to be some of the best-known of their era), it is also notable for serializing Bastard! after it was moved out of the main Weekly Shonen Jump magazine. After 1996, the seasonal specials ended and were replaced with Akamaru Jump (which only published three times a year, skipping the autumn special).