Well, this may not actually be the case. 7 or so years ago FromSoftware was pretty notoriously known to Japanese workers in the gaming industry to have very harsh working conditions, even among other Japanese studios that also have harsh conditions. Allegedly programmers at FromSoftware at that time were making an annual salary of only $27k USD. Compare this with Konami, who was paying an annual salary of $40k USD for the same position.
Its possible in the last 7 years things might have changed, but Japanese companies are usually very resistant to change. Japanese work culture honestly sucks, I would never want to.live in Japan because of this.
EDIT: You can see here that the overall worker satisfaction rating for FromSoftware is only 2.8 out of 5, which seems to be nearly the same as it used to be.
NOTE: Some readers may see something about the "Whiteness/Blackness" of the company. This has nothing to do with race or racism. This is a slang term from Japanese culture that refers to how ethical a company is. A company that is very unethical (overworking employees, borderline illegal treatment of employees, etc) is called a "Black Company," and everyone will tell you to avoid them. Conversely a "White Company" would be a very ethical company and one that everyone would be fighting each other to work for.