Japanese authorities have set a new record for yen-buying intervention in a single day. This action took place in April, according to recent reports from Tokyo. The intervention involved selling a significant amount of US dollars, totaling $40 billion.

This move was part of the authorities' efforts to influence the foreign exchange markets. Further details about this record intervention can be found through Reuters, as reported in the Galveston County Daily News. The news indicates a notable development in Japan's foreign exchange activities, but for more specific information, readers are advised to consult the original source.