Since Abe's appointment in December 2012 and the implementation of the "Three Arrows" (or "Abenomics," from "Abe" and "economics") policy, asset prices in Japan have surged, leading to rising consumer and business confidence, which is a key indicator of economic growth. 

"The 'Abenomics Wealth Effect' has stared to play a key role. Japan's economy and its tax revenues have been given a clear boost with Abe's 'Three Arrows' and we expect the forthcoming regulatory reforms to provide further uplift to Japan's investments markets," said John Vail, chief global strategist at Nikko AM's Tokyo head office, in a statement.

The main thrust of "Abenomics" is to expand the Japanese economy via measures such as quantitative easing from the Bank of Japan, the central bank, and an increase in infrastructure spending, among others.