By Jay
Everything we’ve published about a two-country life has a column for money. Taxes, accounts, which country gets to tax which withdrawal. None of it has a column for the kids. I noticed that recently and felt a specific kind of guilt, the kind you get when you realize the hardest question got left out because it was the hardest, not because it was small.
Dako and I still haven’t decided whether we move to Japan, split the year between two bases, or stay put. Most of what we’ve published so far is about what that choice does to money. This post is about what it would do to small people who didn’t get a vote. Fair warning: I’m the parent who can’t read the Japanese school forms, so what follows is one half of a couple thinking out loud. The Japanese-language sources came to me through Dako, like everything else Japanese in my life.
The part of the dual-base dream nobody models in a spreadsheet
Here is the daydream, and I suspect you have a version of it. Winters somewhere, summers somewhere else. Dako’s side of the family gets real time, not video calls. The kids grow up fluent in two languages and comfortable in two cultures, and they’ll thank us at some wedding toast decades from now.
Then you try to put a child’s actual week into that picture. Where does the school bus stop? Which friends are they leaving every few months? Which bedroom is “their” room? Adults can live in the gaps between two countries. A six-year-old lives in the specifics, and the specifics don’t split cleanly.
Our kids are still little. They go to an English-speaking daycare, and they have no idea their parents run a blog about whether to uproot them. That is the window we’re in: nothing is broken yet, and the decisions we make in the next few years set which country gets to be “home” in their heads. That framing is what finally got the kids column written.
Schooling: what splitting the year actually does to a school career
Start with the calendars, because they settle a surprising amount of the argument on their own.
American schools run roughly from late summer to early summer. Japanese schools run from April to March. The cutoff is brutal in its precision: a child enters first grade in the April after turning six, with birthdays through April 1 counted with the older group. So a family that splits the year isn’t choosing between two schools. It’s choosing between two calendars that start about five months apart.
The “half here, half there” version of the dream dies right here. No school system is built to hold a seat for a kid who leaves every spring. What exists instead are ways to visit. Some Japanese municipalities let children living abroad sit in a local public elementary school for a short stretch during a visit, the so-called taiken nyugaku. The education ministry’s own FAQ is blunt that this is not a national program. Each local board of education decides whether to offer it and on what terms. It’s a favor, not a right, and the answer can differ from one city to the next.
If a family does move for real, Japan’s default is to place a returning child in the grade that matches their age, and to drop them temporarily into a lower grade only if their Japanese can’t keep up. Compulsory education there is nine years, and it’s legally compulsory only for Japanese nationals. Kids of foreign nationals can enroll in public schools tuition-free, but nobody is obligated to make it work for them.
I also went looking for the research on kids who change schools, expecting a verdict on our plan. I didn’t get one. A 2004 meta-analysis of 26 studies on school mobility found moving students landing around the 40th percentile of their non-moving peers in reading and math, roughly three to four months of learning. But the effect was driven by how often kids moved, and by the family circumstances behind the moves. That’s a finding about churn, not about one planned relocation with two parents hovering over it. It does say something about a life where the moves never stop.
So schooling forces the first honest revision of the dream, and I’ll admit the revision is easier to plan around than the dream was. One country is the school country. The other is the visiting country. A dual base with kids is really a primary base with a long, recurring trip.
Friendships, language, and a sense of home
I want to describe how Japanese actually works in our house, because the fluent-in-two-languages fantasy deserves a reality check from someone living the un-fantasy version.
Dako speaks to the kids in Japanese. She and I speak English to each other, which means the moment the whole family is in a room, the conversation defaults to English. Daycare is English. Add it up and the kids’ Japanese exposure is real but thin: a few words landing here and there in a day otherwise conducted in my language. Dako buys Japanese picture books on purpose and keeps them in the rotation, and she reads each book in whatever language it’s printed in. She doesn’t push. That’s Dako’s choice, and I back it, but I won’t pretend it’s a bilingual education plan.
What it produces, so far, is comprehension in fragments. The kids mostly don’t follow a Japanese sentence, but they know the words that come up every day at home: bath time, tidy up, oishii, tanoshii. They know “ofuro” means the bath is coming. That’s the whole current state of their Japanese.
Dako’s argument for doing it anyway is modest. Get their ears used to the sounds, and if they ever decide to learn the language properly, they start with a small head start instead of from zero. I went to check whether that’s wishful thinking, and the research turns out to back her, narrowly. A well-known set of studies by Au and colleagues followed adults who had merely overheard Spanish as young children and later studied the language in college. The overhearers ended up with noticeably more native-like pronunciation than people who started fresh. On grammar, though, they had no measurable edge. Kids who had actually spoken the language as young children did better on both counts, scoring 71 percent on a later grammar test versus 62 for overhearers and 61 for late learners. A separate study of bilingual infants found the share of each language a child hears predicts the share of their vocabulary in it closely. The children hearing very little of a language tended not to use it at all.
So what we’re doing buys accent and familiarity, not fluency. Fluency would take a very different amount of Japanese in their days. In a dual-base life that means months in Japan every year, which loops us straight back to the school problem.
Friends are the variable I have no data for and worry about most. There’s a whole literature on “third culture kids,” children who spend much of their first eighteen years outside their parents’ passport country because of the parents’ work. The recurring theme is a fluency in every culture paired with full membership in none. Some of those adults describe that as a gift. Some don’t. What I keep coming back to is simpler. A kid who leaves every spring is the kid who always leaves. Friends learn that about you.
The trade-offs we’re weighing as parents
Writing it out like this makes the stability case look unbeatable, so let me push against my own draft.
The stay-put version has costs too. It means Dako’s family is a long flight and a language away, and it means the Japanese half of who they are stays a vacation. It also means Dako spends her children’s entire childhood as the only person in the house who lives in her first language. That’s a real loss, and it doesn’t show up in any of the studies above.
There’s also an asymmetry between the two of us that I can’t argue away. In Japan, I would be the parent who can’t read the notes from school. Every teacher meeting, every field-trip permission slip, every group chat with other parents would route through Dako, the same way every trip to city hall already does. I’ve made peace with being cargo at a government counter. Being cargo at my own kids’ school is a different thing, and I honestly don’t know how I’d handle it.
And there are the things we simply haven’t figured out. We don’t have a months-per-country model. We haven’t talked to a single family that has raised kids across two countries, a gap I’d rather admit than paper over with quotes. What we have is the tax residency math, and that turns out to be almost insultingly easier than this.
Where we’ve landed, provisionally, is the version I described earlier. If we do a two-base life, one country holds the school year and the other gets summers, with a supplementary Japanese school or a summer sit-in as the bridge. Japan supports a network of weekend Japanese schools overseas, about 240 of them worldwide as of 2024. North America is the biggest region, so that bridge exists in a lot of American cities. It’s not the dream. It’s the dream with a school bus in it.
Questions to work through before choosing a dual-base life with kids
We haven’t talked to the kids about any of this, and we won’t for a while. These are the questions Dako and I are working through with each other first. If you’re in a similar spot, they might be a better starting point than a spreadsheet.
- Which country is the school country? And would we still want the other one if it were only summers?
- What level of the second language do we actually want for the kids, and what daily exposure would that take?
- Which of us becomes the parent who can’t read the school notes, and is that person okay with it?
- What if a kid refuses to keep moving?
- What would we do differently if we were only doing it for ourselves?
That last one is the uncomfortable one. Some of the dual-base pull is about us: our nostalgia, and the FIRE plan we’ve been building. The kids didn’t ask for two countries. They’ll get whatever version of the plan we’re brave enough to keep honest.
FAQ
Can kids really split the school year between the US and Japan?
Not in any formal way. The two school years start about five months apart, and neither system reserves a place for a child who leaves mid-year. What exists are short summer sit-ins at some Japanese public schools, offered at each municipality’s discretion, plus weekend Japanese schools in the US. A realistic dual-base life has one school country and one visiting country.
Will speaking one language at home make our kids bilingual?
In our experience, a thin stream of a second language builds recognition, and the research adds a lasting advantage in pronunciation, but not grammar or fluency. Active use seems to need a large share of the child’s daily input in that language. Decide what level you actually want before you decide how much of your life to rearrange for it.
Are moves between countries harmful to kids?
The research on school mobility finds real costs, but they cluster around frequent, unplanned moves and the family stress behind them, not a single well-supported relocation. A life of constant back-and-forth looks more like the harmful pattern than a one-time move does.
This post shares our personal thinking as parents, not educational or legal advice. School enrollment rules in Japan vary by municipality and change over time, so please confirm details with the local board of education. See our Disclaimer for details.