My son and 3 grandchildren have moved to Japan

I know why many have left this country in recent years. The brexit brain drain has parted many of us grandparents from our children and grandchildren.

I do not assume that is the reason for the OP's family to have left the country but it is the reason that so many of our families have gone in recent years.

I know only too well how much they are missed.

hales my heart goes out to you. I have a friend whose son did just that and who lives outside of Tokyo. My friend spent quite a few holidays in Japan. She has learned to manage her emotions but it wasn’t easy.

I’m sure your counsellor can help you do the same.

I would advise the OP to ask her son why they moved,to Japan, if she hasn't already done so. It is not a move they would have made lightly. It is possible that he was offered the chance of a better life for his family there. It may not be a permanent move but is likely to be an interesting experience for them all.

We are so much luckier than previous generations of grandparents who had no internet, only occasional expensive phone calls and letters which took a long time to arrive. Perhaps it would help to have more frequent video calls and messages.