I removed the detailed part of the address since it's her personal information.
The town name is Minamiyana, not Minamiyaha. Also, the present zip code of Minamiyana is 257-0003.
The address seems to be changed. The one you wrote doesn't exist now. Furthermore, the address shows she lived in an apartment. I think it's rare she still lives the same place.
Do you know her kanji name? Komamiya is a rare surname, so you might be able to reach her by searching it. (However, also note that it's possible that she's married and her surname is already changed.)