Jo Ringestad

Japanese Yen ETF: A Safe Haven?

How is it possible that a country like Japan can allow their currency to rise so much in one month. They are completely killing their export business and showing the country to be unstable. Looking at yen towards Norwegian Kroner, it has gone from 0.45 to 0.75. Nearly double in a month. Japan needs to stable themself to come to a normal level. Businesses want to buy Japanese products, how is it possible? How can you invest in any Japanese business, when yen is rising so high, they will not be able to stay in business for long if the government doesn't step in. They are shooting themself in the foot.
Regards,
Jo