Two personal computer-related companies affiliated with Aum Shinrikyo failed to declare some 700 million yen in taxable income in 1997 and 1998, sources said Tuesday.

The Tokyo Regional Taxation Bureau is believed to have ordered the companies to pay about 700 million yen in income tax, including penalties and consumption tax.

The payment being demanded by the tax bureau represents the first back-tax to be collected from an Aum-affiliated company as a result of failure to declare taxable income, the sources said.