Rich people in Japan failed to declare a total of ¥65.5 billion in taxable income for the year through June, according to a report released by the National Tax Administration on Friday; This figure decreased by 33.2% compared to the previous year.

During the year, the agency conducted 2,407 investigations targeting the wealthy, including those who own significant amounts of securities and real estate; This figure indicates a decrease of 18.2%. It collected a total of ¥17 billion in back taxes, down 7.1%.

The undeclared income of all people subject to investigation, including the wealthy, rose 10.2% to ¥996.4 billion. Total retroactive taxes rose 2.2% to ¥139.8 billion, again reaching a record high.

The agency attributed this increase in part to the full-fledged use of artificial intelligence to make investigations more efficient.

Business management consultants concealed the largest amount of taxable income per case, averaging ¥38.71 million. They were at the top of the list last year too.

Nightclub servers and hostesses came in second with ¥36.54 million, followed by so-called online content publishers with ¥23.81 million.