Since we're talking about names...Japanese names at that...I have
some questions.

First:        Why is he called Dr. Tofu rather than Dr. Ono?  I would
               normally refer to my doctor or any of my elders by the
               honorific and then the surname.

He seems to be a friend of the family; this may have something to do with 
it.  It's quite possible that, since he's been treating them since they 
were kids, it's something like a pet name.  Like, say, Doctor Bob...
 

Second:   Do Japanese women take on the family names of their
               husbands?

For the most part, yes.  However, it is worth noting that in situations 
where a family business stands to be inherited, the son-in-law marrying 
into a family may take on the woman's surname; he is considered an 
"adopted" husband.  Modern times, of course -- people make up their own 
minds.

In my book, this means when Ranma and Akane get married, *he'll* have 
to make the choice whether or not to become Ranma Tendo, since the Tendo 
Dojo is what needs to be carried on....  There could be a great battle of 
wills over that one...

--bengman
(who just wrote a paper on the _ie_ system this morning)

Venkarel
(who is just curious)