User blog comment:Wrath022/Chapter 516: The Truth About Enchantment, Review/@comment-26441125-20170108065154/@comment-1776824-20170108155802

Shueisha notoriously treats its authors like shit. It's not uncommon for authors to get seriously ill working for them, with no room to take breaks. They'll also axe you at the first sign you stop making them any money, given their slanted and biased series ranking. Kubo had been with them for 15 years, got super sick, and they continued to treat him like shit and still dropped him like a hat. Kubo keeping his illness a secret is fine, because if he didn't, he'd have to go to the doctor, get taken off of work for a good month or two, and then his series would have been even worse off because of the break. The fact that he kept going and didn't take breaks except for mandated days in which he could means that he actually did care about his series.