A Toyota employee has filed a $190m (£103m) lawsuit in the US, alleging that the carmaker's top American boss sexually harassed her.
Sayaka Kobayashi, 42, claims Toyota North American chief executive Hideaki Otaka, 65, made repeated sexual advances to her in 2005.
Toyota said it had a "zero tolerance" policy towards sexual harassment, but declined any further comment.
The news came as Toyota posted a 9% rise in US sales in April.
This was the month's highest gain, and compared with a 6.5% rise at Honda, and yet more declines at the big three US car firms.
'Failed to act'
April sales at General Motors dipped 7%, while those at Chrysler dropped 4%, and Ford's declined 3%.
Overall US car sales in April were down 3% to 16.7 million vehicles.
Ms Kobayashi alleges that the sexual harassment against her took place while she was working as Mr Otaka's assistant in New York.
She further claims that the firm failed to act on her complaints at the time.

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