Looking for my Japanese host family - Sekine

20 years ago I went on a student exchange program to Japan and lived with a host family in Tokyo for a couple of months.
I have very fond memories of my time there and living with my host family. They considered me like a second son and I considered them like my second family.
At that time, I was a student and I did not have mobile phone nor access to emails, so we stayed in touch by writing letters after I left Japan and returned home to Australia.
However, very quickly we have lost contact altogether somehow.

Recently I was cleaning my house and throwing out some old paperwork when I stumbled upon their details that I have misplaced and been looking for years.
I have their home address, email address and home phone number.

Nobody uses landline phones anymore these days.

When I sent an email, it returned undelivered and address does not exist anymore. Looks like the email address have been deactivated.
The email address is inked to IC-Lando - this may have been the company that my host dad (Makoto) worked at 20 years ago.

Their home address was at Omiya-ku, Saitama.
When I tried searching the exact home address in Google Maps, it was unable to locate or pin point the spot - not sure if the house has been demolished or the area has been redeveloped.
It would be good if someone could help me with this. I can send the exact address via DM.

I really miss them and it would be really awesome to reunite and see how they are doing today, if I can locate them, but I'm not sure how.
I'm really out of options as to how I can find them.
Any one have any ideas?

Their names are (Family name in kanji - 関根):
Makoto Sekine (host dad)
Tamae Sekine (host mum)
Shinichiro Sekine (son - he's about my age so would be around 35 years old now)

I could also send old photos of them via DM.

Thank you.

I might be able to help you. I'll send you a DM, so please reply it with their home address and land-line phone number. Land-line phones are still commonly used in Japan (at least many people still have the land-line phone number).

As I wrote in my DM to you, Sekine family seems to live at that address at least in January, 2023, so I think it's highly possible that they are still there. How about to send a letter to that address?

Awesome! Thanks for finding it!! I shall send a letter. Also planning a trip to Japan sometime this year, so I can potentially visit! Thank you very much once again for your help!

Hope you can get in touch with them!

Hi,
I am from TV program that is finding the person whom the foreigner want to see him again and say thank you.
So can I ask some?

・What did they do for you?（because you said "They considered me like a second son")

・Could you send me their photos?

I'm glad to get your reply.If you like,PM is also welcome!
Thank you,
Risako