So Toyota has a company folklore explanation to do with the number of strokes when written in hiragana being a lucky number, but Japanese linguists were skeptic

So Toyota has a company folklore explanation to do with the number of strokes when written in hiragana being a lucky number, but Japanese linguists were skeptical when the BBC did a piece on it and think it was just a preference for the unvoiced version when the town in which it was founded changed its name to match the company: http://news.bbc.co.uk/2/hi/asia-pacific/8534294.stm http://news.bbc.co.uk/2/hi/asia-pacific/8534294.stm