If you’re part of what is known as the general career track (総合職) and are actually being groomed for (middle) management, it’s common policy to move people every 3 years, in theory it prevents building of fiefdoms while also giving you a chance to improve your network, know the ins and outs of your company/government agency and give you the opportunity to accumulate small wins along the way.

The silly policy also extends towards things like supermarket managers, midsized companies with a country wide branch network public school teachers and other nonmilitary civil service positions.

If you’re a primary school teacher, you likely won’t see your students graduate.