Apparently the Liberal Democratic Party of Japan (LDP), of which Prime Minister Abe is a member, limits party leadership to TWO terms. The party is now reconsidering this limitation in order to allow Abe to continue in his position as PM:
Editorial: Doubts linger about extending LDP leader's term. September 21 2016. The Mainichi, http://mainichi.jp/english/articles/20160921/p2a/00m/0na/021000cExtension of power in this way further solidifies power elites, as described here by Gavin Marshall:
The ruling Liberal Democratic Party (LDP) has started discussing an extension of the time the party leader can stay in his or her position, currently set...
Andrew Gavin Marshall. May 28, 2015. Power Politics and the Empire of Economics: An Introduction. The Hampton Institute http://www.hamptoninstitution.org/power-politics-part-one.html#.V-KoIDWYLHo