@matigo So with all their technology Japan can't handle real-time tax deductions? That's bonkers - so in the first year of working people have to put money by against potential future unemployment and taxes owning?
Our system may not be perfect, but at least each month tax is deducted from your pay based on how much tax you should have paid at that point in the year, assuming you remain employed at that salary for the year. If you aren't, you either get a refund, or an adjustment in subsequent years. I assumed other countries took the same (sensible) approach!