Denny, this is hilarious, you're absolutely right -
When I asked the concierge “Is this was the bus to take for my destitination.” the answer I eventually guessed was essentially “Well, yes if you want to travel there via Chicago “ rather than a simple “No. You want the other bus”, which I think would have been considered a rude response, perhaps confrontational or argumentative.
NO ONE in Japan ever says 'no'. It's a very long winded response which basically means, 'well actually not like that, it's a bit different', (but said much more politely).
Yes, 'Ohio' is only used among friends, but bostonphil, you're a lady of a 'certain age' I would expect them just to be thrilled you're trying. "Ohio gozaimasu' is much more polite. But only used in the daytime. In the evening, it's "Kon ban wah".
We could go on endlessly about Japanese etiquette, frankly bowing is SO subtle. I recall my boss receiving an honor that got photographed for the newspaper, the guys cut it out of the paper to keep so they could LAUGH at him. BTW, he'd lived in Japan for 20 years, his Japanese was perfect.
Just do your best, relax and smile, never show anger, and compliment them on their amazing, beautiful country and culture. You'll do great!!