Earlier quoted context omitted.
> It is possible that she has a long history of staying absent from work. She did. She'd only been working there from December, used up all her sick-days while still in training, and missed even more days in the following months. One time she missed work because she couldn't find her car keys. It sounds like her manager got fed up and that was the end of it. Being a single parent is hard.
"used up all her sick days" ... the whole idea that sick days are something you can run out of is so .. wrong.
Yeah, Japan doesn't have sick days at all, they are called, literally, holidays!