Among the sponsors is a pharmaceutical company called Cho-A Pharmaceutical.
The problem is
In the story, the dark side that killed hundreds of people by creating mutant Yeongasi is Cho-A Pharmaceutical.
Purpose too
This is to sell Windazole, which is an insect repellent that actually exists and is a treatment for variegated stings, at a high price.
Of course, the movie production company wanted to use a fictitious trademark, but Cho-A Pharmaceutical said it would help with publicity and instead let them use their own trademark and product…