Japan has the most stable environment for companies. In the list of the oldest 5 worldwide the japanese companies were founded in 578 until 771 AD, which makes them more than 1400 years old!
According to a report published by the Bank of Korea in 2008 that looked at 41 countries, there were 5,586 companies older than 200 years.
3,146 (56%) are in Japan
837 (15%) in Germany
222 (4%) in the Netherlands
196 (3%) in France
Of the companies with more than 100 years of history, most of them (89%) employ fewer than 300 people. A nationwide Japanese survey counted more than 21,000 companies older than 100 years as of September 30, 2009.