There have been three booms and two busts in teacher demand in Japan after the Second World War to today. We first analyzed the reasons in detail. Big waves of teacher demand occurred because the waves of births came every thirty years, increase in retirees of teachers came every thirty-five years, and the two waves overlapped positively around 1980s and negatively around late 1990s. Then we analyzed the size and organizational change of the national schools of teacher education for about 70 years after the Second World War.
Next, we analyzed the different response between national and private sector toward the elimination policy of suppression of admission capacity in the field of teacher education in 2005, then considered dual sector of primary school teacher education after that. Finally, we discussed how to cope with the possible drastic decrease in teacher demand during the period from the 2020s to the mid-2030s.