国际英语新闻：Commentary: Three PM elections in a year upset Japanese politics

Long-term economic stagnancy in Japan has resulted in the public easily losing patience with the ruling party. The government, in order to rally public support, chooses another political heavyweight within its camp to serve as prime minister. But no sooner does a new prime minister assume office than a new round of political wrestling starts within the ruling party.

Japan's political turbulence has considerably effected the planning and implementation of the country's economic and foreign policies. For example, the Japanese government and central bank didn't adopt major measures to tackle the appreciation of the yen in the past weeks before a new prime minister was elected.

However, for any Japanese prime minister, it is a tough task to secure long tenure and avoid political volatility.