What does Japan's economy and North Korea's economy have in common?

There are practically no similarities at all between the Japanese economy and the North Korean economy except very fundamental aspects of economies that are universal today (presence of money, concepts of corporations and partnerships, the delineation between consumers and producers, etc.). The Japanese Economy is primarily capitalist with a number of large corporations primarily owned by specific families and other large corporations. Often times the corporations that own each other do so in a more circular way, e.g. A owns part of B and C, B owns parts of C and D, D owns parts of A and C in a complex web.

This web is called "keiretsu" and is a modified form of the "zaibatsu" which was the prevailing form of the Japanese economy from the Meiji Era until the end of World War II. There are smaller partnerships and other organizations, but most employed Japanese work for a corporation that is part of the keiretsu. Japan also engages in high levels of trade with other countries, importing the raw materials that it lacks and exporting the manufactures and technological goods that are used worldwide.

The North Korean economy, if the laughable economic failure that is North Korea could be called an economy, is primarily state-run, meaning that the corporations that operate in North Korea are directly owned by the government, in all or in part. The North Korean economy functions as a command economy, where the North Korean government chooses production quotas. These quotas are usually either (1) insufficient for the needs of the North Korean people, leading to shortfalls and domestic problems, or (2) impossible for North Koreans to produce given the raw materials they have access to.

Compounding the problem of the command economy, the North Korean economy tries to practice autarky, which is where the company intentionally limits trade with foreign partners,. This results in North Korea continuing to self-impoverish.

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