This is something I sort of have experience with...
To get to the point where you feel you have no other choice but to die, you have to be in an incredibly bad place. The type of place where it takes all of your energy just to get out of bed, where going to work is often an unthinkable effort, and where talking to other people is nearly impossible.
When you get to that place, really, what's needed is professional help, which she may or may not get considering Japan's perception of mental health. She needs time away from her career (which is IMMENSELY stressful), therapy, and rest.