This is a third part of an as yet unknown total, where I investigate possible new policy agendas, which are designed to meet the challenges that Japan is facing in the immediate period and the years to come. The first two parts were written in the context of the elevation of Ms Takaichi to the LDP presidency. It was anticipated that she would then become the Prime Minister as a result of commanding a majority on the floor of the Diet, with help from long-standing coalition partner Komeito. However, in the last few days, things have changed considerably in Japan with Komeito withdrawing from the ruling coalition and throwing the question of who will become the Prime Minister up in the air. One of the issues that are shaping what happens next is the question of social security sustainability as the society ages. This divides the parties and will help to determine the configuration of the next government in Japan.