International Comic and Manga Schools Contest by Celsys

CelSys, the company behind popular art software Clip Studio Pro, are hosting an international competition for artists to win cash prizes and Wacom tablets. 

From the Press Release:

Submit your work to our comic, manga and illustration contest for a chance to win a cash prize, a Wacom Cintiq Pro and even a chance for your artwork to be featured in Japanese media! This contest is open to students enrolled in an Art/Design school, vocational school, school art club, or after school art program.

Submission Period: January 30, 2019 (Wed) - May 9, 2019 (Thurs)

Illustration Category: Original color illustration
Comic Category: Original color/black-and-white comic between 8–48 pages
Webtoon format accepted (At least 30 panels, maximum of 690 x 20,000 pixels)

Full details can be found on the official competition page