A wholly owned affiliate of NEC Corp. admitted to the Defense Agency on Thursday that it overcharged the agency for repairs of defense equipment.

According to the agency, officials from the Tokyo-based NEC Radio Equipment Engineering visited the agency's headquarters Thursday morning to voluntarily confess, though they did not specify by exactly how much they overcharged the agency.

Agency officials said they would soon inspect their dealings with the firm, which amounted to 5.5 billion yen in fiscal 1997, and ask it to repay the overcharged amount.

NEC Radio Equipment Engineering repairs NEC Corp. navigation, radar and communications systems at Self-Defense Forces facilities throughout the nation.

NEC Corp. itself admitted last week that it overcharged the Defense Agency for at least five years and kept bogus books for defense equipment accounts.