There is a particular kind of tired that shows up after years in Japan. It is not the culture shock of the first winter. It is quieter than that.
You have done the work. You learned the language well enough, held a job, filled out the forms, built routines. Then one day you notice that if someone asked why you are still here, the honest answer would be a single name.
That realization can feel lonely and a little frightening. If your partner is Japanese, settled in a stable career, and sees no reason to move, the question stops being "Do I want to live here?" and turns into something heavier: "Does staying together mean staying here?"

Most people who move to Japan arrive with a long list of reasons. Career growth. Curiosity. Food, safety, trains, a fresh start. Over time, some of those reasons fade, and that is normal.
What tends to happen to long-term residents is that the list shrinks without anyone noticing. Maybe pay never rose the way you hoped. Maybe the exchange rate made saving or sending money home feel pointless. Maybe your family is getting older in another country and every visit ends with a harder goodbye. Maybe the mood around foreigners feels different than it did when you arrived, even if you cannot point to one moment.
None of these are dramatic on their own. Together, they can leave one reason standing. And one reason is a lot of weight to put on one person.
Here is the uncomfortable part. When your partner becomes the only thing keeping you somewhere you are unhappy, your brain starts quietly linking them to the unhappiness.
They did nothing wrong. But every frustrating day at work, every rent payment, every lonely weekend gets filed under "the price of staying for them." Resentment can grow from that, even toward someone you love deeply.
In my experience, this is the trap that breaks more couples than the actual decision. Feeling trapped poisons everything nearby. It is very hard to enjoy a relationship that feels like the lock on a door.
So before deciding anything about the relationship, it helps to pull the two things apart.

These are not tests with right answers. They are ways to notice where the heaviness actually lives.
That last one matters more than it seems. A lot of country unhappiness is really isolation. When your whole social world is your partner and your coworkers, any country would start to feel suffocating.
Many couples avoid this conversation because it feels like it can only end in "you leave or I leave." It does not have to.
Try talking about time instead of location. Could you agree to revisit the question when a degree ends, or in two or three years? Are there options in between, like longer stays near family each year, remote work, or a defined trial period somewhere else? Does your partner know how unhappy you have been, in plain words, without it sounding like blame?
Your partner's reasons for staying are real. A secure job at a large company in Japan is not easy to walk away from, and their career and family are rooted here. Your reasons for wanting to leave are real too. Both people's lives count equally. The goal is not to win. It is to stop one person from silently carrying the whole cost.
If you keep going in circles, a couples counselor who works with international couples can help. Sometimes a neutral third person makes it possible to say the thing you have been rehearsing in your head for months.

Whatever you decide, one thing helps almost everyone in this spot: widening your life so your partner is not your only anchor.
That does not mean forcing yourself to love Japan again. It means building a few connections that are yours. A friend who also left home years ago and understands the in-between. Someone who speaks your first language. A person back home you talk to every week, not just on holidays. People who know you outside of your relationship and outside of work.
This works in both directions. If you stay, having your own people makes staying a choice instead of a sentence. If you leave, having friends in the place you might move to, or friends from home you have kept close, makes the move less frightening. Your social life should not depend on one passport stamp.
That is a big part of why we built SewaYou. It is a map-based friendship app for meeting people nearby and anywhere in the world. You can find other long-term residents in your own city who get what you are going through, or explore another city or country from home and make friends there before you ever decide to move. Online friendships count. Sometimes they are the ones that carry you through a hard year.
Long-term residents give every possible answer to this question, and most of them are honest. Some would do it all again. Some would have left sooner. Many would choose it again but live it differently: more friends, more trips home, less waiting for things to get better on their own.
You do not need to answer it today. What you can do today is stop letting one person carry the full weight of your reasons. Talk to them honestly. Talk to people who are not them. Find out what your life looks like when it has more than one thread holding it together.
The decision about Japan will be clearer once the loneliness is not making it for you.
Download SewaYou to meet people nearby and around the world, and give your life here, or wherever comes next, more than one reason.