Koichi Kato, a former lawmaker of the Liberal Democratic Party, failed to declare some 80 million yen in taxable income in the three years through 2001, informed sources said Monday.

Tax authorities have accordingly levied about 30 million yen in additional taxes and penalties on Kato, the sources said, adding that the former LDP secretary general has now revised his tax returns.

The income initially went to Kato's political-fund management body.