Weekly Shonen Jump Magazine
- act-age - Volume 11
- Demon Slayer: Kimetsu no Yaiba - Volume 20
- Samurai 8: The Tale of Hachimaru - Volume 5
- I’m From Japan - Volume 6
- Haikyuu !! - Volume 43
- Majo no Moribito - Volume 1
Shonen Jump + Magazine
- 2.5-Jigen no Ririsa - Volume 4
- SSSS.Gridman - Volume 2
- SPY × FAMILY - Volume 4
- Aharen-san wa Hakarenai - Volume 9
- Ohisama Party - Volume 1
- Kaibutsu Shōjo wa Hatsukoi no Yume or Miru ka? - Volume 3
- Psychoagainst - Volume 5
- Summer Time Rendering - Volume 10
- Shijin-sō no Satsujin - Volume 2
- World’s End Harem - Volume 11
- Haikyu-bu !! - Volume 2
- Haikyu-bu !! - Volume 3
- Bōkyaku Battery - Volume 7
- Yōkoso Bōrei Sōgiya-san - Volume 1
Jump Square Magazine
- Kojirase Hyakki Dominor - Volume 5
- The New Prince of Tennis - Volume 29
- Desert 9 - Volume 1
- Rurouni Kenshin: Hokkaido Arc - Volume 4
The main reason for the delay of some magazines is because there are suspicions that a worker from the publishing company is a carrier of the COVID-19 virus since on Thursday, April 2, the worker reported ill to the company explaining his symptoms. For this reason, the worker attended a hospital and was ordered to stay home and not leave until a COVID-19 test result was obtained. For this reason, Shueshia ordered her employees to work from home starting April 6. Additionally, the Weekly Shonen Jump editorial department has temporarily halted all work to further reduce the risk of spreading the infection to manga creators and others involved in the magazine.
However, the editorial also clarified that this worker does not work in an area that puts at risk the health of the authors of the different manga that they serialize.
Sources: Shueisha, Mainichi Shimbun's Mantan Web