The taxman has caught up with male vocal group Exile’s management company.

Media reports here say that the Tokyo Regional Taxation Bureau recently discovered that LDH, the Tokyo-based agency that manages Exile, failed to declare a total of 200 million yen ($2.2 million) in income in the two years ending March 2009. Half of that amount was considered taxable income.

“Accounting errors” are blamed for the apparent oversight, and the tax authorities have assessed LDH 100 million yen ($1.1 million) in back taxes, including penalties. LDH has reportedly paid up in full and denied any intent to conceal income. The agency’s president is Exile leader Hiro.

Exile, which is signed to Tokyo-based label Avex, was Japan’s top-selling domestic act in 2008. Its November 2009 single, The Generation – Futatsu no Kuchibiru, was one of last year’s five-top-selling singles, according to local labels body the Recording Industry Association of Japan. Exile, which now boasts no fewer than 14 members, has sold over 17 million albums and singles since its debut in 2001.