The Chief of Nintendo Co. acknowledged that the firm's recent threat against young children who are using the latest hand-held 3-D game machine which apparently would affect the sales, but said the 3DS isn't a "dangerous" product.

Nintendo's latest news to lure users? 3 dimensional technology, that doesn't need glasses. WSJ's Sebastian Stein reports from the, release of Nintendo 3DS at an exhibition in Japan.

"We are being proactive about informing our customer, even though it may not necessarily be positive for our sales," said Satoru Iwata, Nintendo's president, in a rare interview.

The health-related threat, which claimed that children six years old and younger shouldn't play games in 3-D mode on the soon-to-be proffered 3DS hand-held game device, which was aimed to be a safety measure to inform customers, said Mr. Iwata.

He did not refuse to observe the fact that concerns over possible litigation was one of the reasons behind the threat, but he also said that it was not the main reason.

The company stated that its website late last month that observing at 3-D images for long periods of time might have an unpleasant effect on eyesight development. The warning has caused a disturbance, in part since it did not offer details on the medical evidence.