[Nyororin]

Without something more detailed, it is going to be VERY hard to track her down. Most likely, she married and her name is now different. I am willing to say with a fair bit of confidence that it was likely Seto Satomi, as Setomi isn`t a name. (Both Seto and Sato are surnames though.)

There are numerous ways to write Japanese names, so it would be very hard even if she had never moved and never married. If you had an old address, it might be easier.