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Keeping Japanese Alive When You Live Abroad

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Keeping Japanese Alive When You Live Abroad

Almost every family raising children outside Japan arrives at the same quiet moment: the child still understands everything, and has stopped answering in Japanese. These guides are about that — why it happens, what the research actually shows, and what changes it. They are written for families abroad by the editorial team at Nijiiro, a Japanese education media site, and they assume you are tired of being told to try harder.
The one idea these guides share
  • Understanding and speaking are two different systems. Comprehension survives on exposure. Speech only grows when somebody is waiting for an answer and cannot switch languages.
  • Parents cannot create that pressure. Not because they are inconsistent, but because the child knows the parent understands English. This is structural, not a failure.
  • Nothing is lost. A child who understands has the whole system built. What has gone quiet can come back in weeks, not years — given the right situation.

Start here

If you are not sure which guide you need, this is the order most families find useful.

01Your child understands but will not speak

The core guide. What receptive bilingualism is, the three forces that switch Japanese off, what a study of 1,899 bilingual families found about which households keep the language, and a realistic 90-day plan. Read the guide →

02Your children speak English to each other

If you have more than one child, this is probably the largest block of language in their day — and it is running without you. Why the sibling pair flips, why it rarely flips back on its own, and what actually moves it. Read the guide →

03Then pick the guide that matches your household

If only one of you speaks Japanese, start with the guide for that household — it is the hardest configuration in the research and the one with the most unused levers. If the loss you feel most is your child’s relationship with their grandparents, the grandparent guide is the practical one.

The guides

The core guideChild Understands Japanese but Won’t Speak It: What Brings It BackSiblingsYour Children Speak English to Each Other: The Sibling Switch, and How to Undo ItOne Japanese parentHalf-Japanese Child Not Speaking Japanese? When Only One Parent Has the LanguageGrandparentsChild Can’t Talk to Their Japanese Grandparents? How to Close the GapWhen it is not reluctanceSelective Mutism in a Bilingual Child: Silent Period or More?

If your family might move to Japan

Spoken Japanese stops being sentimental the moment a move becomes real. The Japanese government’s own figures show why: as of 1 May 2025, 84,759 children in Japanese public schools needed Japanese-language instruction, and 11,446 of them were Japanese nationals — overwhelmingly children who grew up overseas and came back. Among students needing that instruction, the rate of going on to university and similar institutions was 41.2%, against 75.0% for students overall.

That gap is not about ability. It is what happens when a child has to learn the curriculum and the language of the curriculum at the same time, in their teens, with the clock running. These guides cover what happens after you land.

Japan guideJapanese Public Elementary School for Foreign Children: A Parent GuideReturneesReturnee Child Struggling at Japanese School: A Parent’s GuideJapan guideBullying in Japanese Schools: What Parents Can Do Under the Law

What the research says, in one table

The findings these guides keep returning to, so you can see the evidence base in one place.

FindingFigureSource
Share of families where at least one child spoke the home language, when one parent used both languages and the other used only the majority language35.7% — the weakest of five household patternsDe Houwer (2007), 1,899 families
The same figure when both parents used only the minority language96.9%De Houwer (2007)
Parents of children in English-only preschools who reported their home language being displacedabout 51%, against just over 10% in primary-language programmesWong Fillmore (1991), ~1,000 families
What an older sibling changes at home: majority-language use by the younger childmedian 49 vs 20 for first-borns — while parental input did not differTsinivits & Unsworth (2021)
Time to conversational fluency vs academic language in a new language6 months–2 years vs at least 5 years (up to 7 without first-language support)Cummins; Collier & Thomas (1995)
Children in Japanese public schools needing Japanese-language instruction84,759, of whom 11,446 are Japanese nationalsMEXT, as of 1 May 2025

How we write these

Three commitments, because this is a field full of confident advice with nothing behind it.

Our rules
  • Numbers come from the original source. Government statistics from the ministry that published them; research findings from the paper, with the citation given. Where a widely repeated figure could not be verified in the original — the commonly quoted “20–25% of input” threshold, for example — we say so rather than repeat it.
  • We say what will not work. Including the things we are connected to. Every guide has a section on who it is not for.
  • We do not use guilt. The arithmetic of raising a child in a second language abroad is genuinely against you, and most families reading this have been doing the right things already.
TOMODACHI JAPAN | Online Japanese school for children growing up abroad
Children who cannot switch to English

Every guide here lands on the same condition: your child needs to be understood in Japanese by someone who has no other option. TOMODACHI JAPAN is an online Japanese school built around that — classes of eight, grouped by what a child can currently say rather than by age, alongside children in Japan. Beginners from zero are expected. The pilot opens in December 2026 and the school guide is free.

Visit TOMODACHI JAPAN
Written by the Nijiiro Editorial Team (corrections policy)
Published: 5 October 2026 / Last updated: 5 October 2026