The way this has worked is that the Japanese economy has bifurcated with the graduation-to-retirement employment being available to a ever smaller group of white collar workers called salary-men. To become a salary-man you have to go to college and get hired the year you graduate through campus recruiting. If you miss your "window" then you can't become a salary-man and will be stuck in contingent work for the rest of your life.
The people quitting in this case are not salary-men (a salary-man quitting would be pretty unthinkable) but their bosses probably are, hence the cultural divide.
Sometimes salary-men do lose their jobs due to bankruptcy of the organization for instance. Typically the solution if that happens is to jump in front of a train.
Tactical nukes aren't real. They start an escalation ladder that gets you to global thermonuclear war in a few hours. Using a "tactical nuke" is just laying naked your intent to have things go nuclear while giving your opponent a chance to respond.
During the Cuban Missile Crisis Kennedy wanted to nuke Cuba. The joint chiefs told him that if he wanted to do that he would also have to nuke Russia in a massive fully committed first strike.