Was it hard for you to move there, and "restart" your social life there so to speak?
What's the socialization culture like there? Drinking like the US?
That's a great question.
I had lived here a few times; 1994 for a month, 1995 for three years, and now 2007 to present.
The first time, and the start of the second time I got a bit of the blues, as I think I over-hyped the experience in my head.
This happens a lot I hear, particularly people who want to live here as opposed to those assigned as an ex-pat.
I think this third time was easiest as I came after being hired by a large company with a real job (not teaching English, etc) which was more appropriate for a 30 something guy with a family.
As far as daily life, Japan is easy for me as I am a quiet guy usually who is happy to be on his own. If you need lots of friends around it can be tough.
There are a few different mindsets in Japan in regards to foreigners.
First of all we are ranked in in terms of desirability by where we come from. Americans are the top of the list.
Then some Europeans, especially Italians and French, as Japanese love Euro culture (or what they think it is).
Appearance then comes into play, tall blondes will get much more attention, but also intimidate many, so they stay away.
There are the Japanese who love other countries and want to make friends with Gaijin, some girls even dream of marrying an American or European - quite naively.
Some guys will try to chase blond girls, some girls will try to hook up with any foreigner - but these are outliers.
There are few old people left who have a bad feeling towards us. Some older folk just find us strange and don't want us living among them,
We are seen as loud, obnoxious, rude, and selfish. Perhaps not without reason! Lots of foreigners are to be honest.
When the older generation comes into play it can effect us in ways such as being denied an apartment because Gaijin are not trusted.
There is racism here, even though in general they make you feel special. I am as popular as I could wish for, but I cannot get a credit card because I'm a foreigner, even with permanent residency.
Don't get me wrong though, for the most part a decent looking Western Gaijin is treated like a celebrity. Some let this get to their heads unfortunately and crash bad when they go home.
People overall are extremely nice and polite to us, and I personally cannot recall a negative face to face confrontation.
I have built a network mostly through the gym of high-quality foreigners like myself; Americans, Italians, Spanish, Aussies, Irish, Germans, etc...
I don't have any real close Japanese relationships, because most of the pure Japanese I meet in my gym are a bit "grey"; lots of Yakuza and related.
These guys and real Yakuza will often be the ones who approach me though, as they are less fearful than the regular Joe.
I have a few buddies among these grey guys, but avoid getting too close to Yakuza.
Work relationships with most usually stay at work, because the average Japanese thinks being social is getting really drunk as often as possible.
There are often several drinking meetings per week (nomi-kai) and people know better than to invite me. This is easier as they recognize me as a "healthy guy" LOL.
As I don't drink, nor can I tolerate the presence of drunk people, I stay away.
Japanese get really really smashed and pass out and vomit a lot.
Sometimes on the way to work in the morning (I walk) we see young people stumbling around teetering almost into the street, try to hail cabs.
Because Japan is so safe, they don't really fear anything. They won't get robbed, etc.
My wife is my best friend.
She is a worldly, beautiful woman who even trains with me (she even competed recently!)
I also have wonderful daughter who is forever daddy's girl, even though she is 14 next month.
Between them and my closest friends, I have no wants for quality companionship.
This is my anchor, without them it can be tough, especially for introverts. Even a big extrovert will have issues, as Japan will try to push them down a bit.
Because I know ho things work here, and I know the social traps, I also reach out to new ex-pat when they arrive in my company to show them the ropes.
We always end up great friends.