I live in the US and have lost touch with my relatives in Nagoya Japan I have an old address and have recently tried to send a letter to that address and it was returned with a stamp "return unknown" How do I find if the address has changed or if that address is even still the same? I realize after 42 years since I visited them there in 1981 that many things have changed as it has here in the US. I would like to be able to connect with relatives again but it seems impossible since my mom has passed. Can anyone help me or give me any advice? Thank you !