By Yoko Kubota 

OZU, Japan-- Honda Motor Co.'s chief executive apologized for the company's failure to report to U.S. regulators more than 1,700 incidents involving death or injury over the last decade, saying there had been "multiple mishandlings."

"From what I hear, the origin of this goes back to differences in what we thought and what the regulators were seeking," Takanobu Ito, Honda's chief executive officer, said Tuesday, referring to the reporting of incidents. "But on top of that there appears to have been multiple mishandlings and I am very sorry about that," he told reporters at Honda's Kumamoto motorbike plant in Ozu, southern Japan.

Mr. Ito's apology comes as Honda, embroiled in one of its biggest recalls ever, faces criticism over its safety record. The Japanese auto maker recalled around 9.7 million vehicles in the last six years over explosive air bags made by Takata Corp. that could shoot out shrapnel at people, a problem linked to five deaths in Honda-made cars.

Honda said in a statement that it had used an overly narrow interpretation of what it needed to report to the National Highway Traffic Safety Administration under the Tread Act. It also said data entry and component coding errors had contributed to the underreporting of claims.

Under the act, auto makers are required to notify the NHTSA of all deaths and injuries involving their vehicles as "early warning reports" or face a fine of up to $35 million for failing to do so in a timely manner.

On Monday, Honda provided the NHTSA with its findings about problems in its internal tracking system for death and injury claims. It said failure to correctly enter dates of claims and to match up internal and NHTSA component codes had led to discrepancies in reporting along with its narrow interpretation of what constituted a written claim.

Eight of the 1,729 unreported incidents were related to Takata air bag problems, the company said in the statement. The NHTSA was notified of those eight incidents through separate means, Honda said.

The recalls by Honda, Takata's biggest customer, account for more than half of the 17 million vehicles that have been recalled over air bag problems globally since late 2008. As auto makers try to replace potentially defective parts, the pace at which they can secure replacement air bag inflaters is becoming a focal point.

Mr. Ito said he hoped Takata would boost its inflater production capacity.

"We need Takata to be reliable and we need them to work hard to figure out the cause of this issue as well as on supplying parts," he said.

He didn't speak about whether Honda is in talks with other suppliers on replacement parts.

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