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Chinese electric vehicle titan BYD's booth was pride of place at the Japan Mobility Show in Tokyo last month. The U8 model, pictured, made its first appearance outside China at the event. (Photo by Mizuho Miyazaki)

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TOKYO/HONG KONG -- It was just before 11 a.m. on Oct. 25, at the start of the Japan Mobility Show, the country's premier auto extravaganza held in Tokyo. A sizable crowd, including Koji Sato, CEO of Toyota Motor, had already assembled around one booth, waiting for a news conference.

Unheralded and unannounced, one man dressed in a low-key navy blue suit and tie emerged from backstage and took a seat in the audience.

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