Japanese tax authorities say the amount of additional taxes levied on undeclared income has reached a record high of about 139.8 billion yen, or about 932 million dollars, due to the use of AI technologies.

The National Tax Agency says regional tax offices conducted more than 600,000 income tax inspections over one year through June.

They found 311,264 cases of unreported income and failures to pay income taxes properly. The amount of undeclared income was 996.4 billion yen, or about 6.64 billion dollars.

The amount of additional taxes was 139.8 billion yen, or about 932 million dollars. This is up 3 billion yen, or about 20 million dollars, from the same period in the previous year. The figure marked a record high since the present method of compiling statistics was introduced in 2009.

By type of occupation, the per-case amount was the largest for management consultants, at 38.71 million yen, or about 258,000 dollars, followed by bar hostesses and hosts at 36.54 million yen, or about 240,000 dollars, and online content distribution at 23.81 million yen, or about 160,000 dollars.

The agency cited the full-fledged introduction of AI technologies last year as one reason for the amount of additional taxes hitting a record high.

The agency says officials had AI learn about cases involving undeclared earnings so they could focus their inspections on taxpayers who may have failed to properly report their incomes. The taxpayers include those whose declarations had many deficiencies or whose declared amount was a rounded figure, or those with occupations where a large proportion of income is paid in cash.