The planned merger of two Japanese banks is the latest unhappy chapter in the 10-year saga of foreign private equity capital’s adventure in Tokyo finance.

The two banks, Shinsei and Aozora fell into the hands of Ripplewood and Chris Flowers and Cerberus Capital Management respectively at what appeared to be close to the end of the country’s lost decade. The two purchases came after the Ministry of Finance was unable to find any domestic buyers for the two ailing institutions. Ten years on, the two are still not healthy. Both got into trouble like many of their US peers by straying into investments that promised high yields with seemingly low risk, whether junk bonds that proved worthless for Shinsei or a piece of GMAC in the case of Aozora. It has been easy for both banks to stray from the banking business in Japan in recent years because they lacked a broad base of cheap funding from deposits and they never became the go-to source of loans for corporate Japan.