First, having spent at least half my life living abroad, what do I miss compared to where? I scarcely have a native culture any more and hardly resonated with the one I grew up in anyway.
That said, what I miss has more to do with quality of life than specific things. Namely, space and consideration. In Japan, Tokyo particularly, spaces are cramped and people crowd these tiny spaces without any concept of personal space (space, space, space!!!) much less respect for human dignity. Witness the white-gloved station attendants shoving the last stragglers through the doors of the inhumanly crowded trains. I could go on about this, but I'll desist. Or is that resist?
People complain that Tokyo is cold. WTF?? Tokyo never gets below chilly. Lately, it's been unseasonably warm, and last weekend I observed a pair of under-dressed, coddled women complain -- or were they just making conversation because they have nothing much else to say? (and don't get me going about the vapidity of Japanese women) -- "Ooh, it's cold!" Are you fucking kidding me?! I only once have witnessed a day here (in Yokohama, actually) where it dipped below freezing and the snow (snow??!!!) crunched under my feet.
The problem here is that whatever temperature it is outside, it is also inside. Welcome to the poverty mentality of Japan, where the ruling elite have been raping and despoiling the commoners since ages immemorial and they passively comply because even though everybody is utterly miserable they have not the vaguest concept that any other mode of lifestyle is possible. And living among these human cattle wears down any ostensibly sane person fairly quickly.
And I've barely even fucking started . . .
Tokyo is a nice place to visit, but I wouldn't want to live there . . .