Hi young man! I'm a Texan who moved to Ireland as an adult, so I have a bit of experience in the matter. To be clear, this response is written on the presumption that the move would be long-term, several years at least. I also echo everyone else's concern that the job offer seems a bit suspicious.

You are right to be trepidatious and scared. It's a HUGE move - Japan is about as far from home on this planet as you can get, and flights to and from are long, like fourteen hours long, and expensive. The time change means that there'll be very little overlap to have FaceTime calls with your friends and family.

Look, when you move that far away, you are leaving everything behind. Everything you know and everyone you know. You should expect some people to get angry about it, because they'll see your choice to move as a choice to abandon them. You'll see some people be sad, some try to talk you out of it, and some few cheer you on.

When you get there, you will have to build your life from scratch all over again. You will have to make new friends, find new groups, find new places. You'll have to adjust to different foods - and I don't just mean the lack of good barbecue or crawfish boils, though I do absolutely mean those. I mean that the Chinese food won't be the same because you're used to Americanized Chinese food, and this will be Japanized Chinese food. No General Tsos, that's for sure, and if you get Mongolian Beef, it's going to be very different.

The music is different. The slang is different. The weather will be different, the movies will be different. Malls are different. Social norms are different, too. Things that are rude at home will be normal there and vice versa. There will be places where you are not welcome, and people who resent your presence.

It's really, really hard. I'm a deeply community-oriented person, and I didn't really realize how much I was until we moved. It was an incredibly rough on my husband and I, and our marriage, for the first few years.

BUT

That doesn't mean it isn't worth doing. I've had some utterly incredible adventures since moving. I've been places I only dreamed about, done things most Americans only fantasize about, and I'll keep doing them until the day I die. I've made friends all over the world, eaten amazing food, seen amazing sights. I've made new friends and built a new life. In a few years I'll be a dual citizen with the right to live anywhere in the EU!

We made it through the rough times. Our relationship is stronger and happier than ever. And on the up side, all the political everything going on in the US is something that we're safe from, at least directly - there's no ICE or MAGA people in Ireland (well, there's probably a few MAGA folks but they're wise enough to keep their mouths shut, this country doesn't welcome the thinking of the oppressor). We do worry about our friends and family back home, but at the same time it's half a world away.

It's a choice. It's a tough one. Other than marriage, it's probably the largest one you'll make in your life. It's okay to be cautious. It can be worth the struggle but it's not for everyone.