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I think you guessed right about Hitachi. I'm sure the brand is at least as well-known in Japan as it is in the US, maybe more so. Seems a bit like an American person naming their kid Whirlpool or Chevrolet.
I really can't give much opinion on the other two names, as they are so foreign to an English speaker that any nuances or vibes they might hold are lost in translation.

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Before you criticize a man, walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes!
Steve Martin