Nintendo's 3D-capable handheld game player contains chips manufactured by Toshiba, Fujitsu and Invensense, technology firm iFixit said after dismantling the hot new gadget.
The 3DS, the first handheld game player to provide glasses-free 3D, was released in Japan on 26 February and is set to hit stores in the US on 27 March.
Nintendo expects to sell four million units globally by the end of March, hoping it will outpace even its popular predecessor, the DS.
The flash memory chip was provided by Japan's Toshiba, the world's second-largest NAND chipmaker after South Korea's Samsung Electronics.
The CPU was designed by British firm ARM Holdings and the gyroscope was supplied by US-based Invensense, iFixit said on its Web site.
But California-based iFixit, one of the so-called teardown firms hired by clients to provide data and competitive intelligence, said it had unusual trouble identifying the purpose of chips provided by Fujitsu and Texas Instruments.
Nintendo, like other consumer electronics firms, does not reveal where it sources the parts for its products.
"We just could not find out what they were," Miroslav Djuric, director of technical communication at iFixit, said in a phone interview.
The manufacturers of the lithium-ion battery and the 3D liquid crystal display screen were not immediately identified, though Japan's Sharp showed off small 3D screens for glasses-free use at an event last year.
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