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Japan's carmakers proceed with caution on self-driving cars

They're unwilling to take a software-testing approach and put features on the road before they're deemed to be ready

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The Nissan IDS concept car on display at the Tokyo Motor Show on Wednesday.

Tokyo

THE technology in use is virtually identical: cameras, radar, and GPS working together to turn cars into self-driving machines. What separates Japan's carmakers and companies like Google Inc and Tesla Motors Inc is when they predict fully autonomous vehicles will be ready.

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