Short answer: no, you don’t need it to get hired. But it decides how many doors are open to you — and how far you can go once you’re inside.
English-only engineering jobs in Japan are real. But the data says they’re a small part of the market — and they’re concentrated in specific kinds of companies and roles. Many engineering teams in Japan, including mine, run their daily work entirely in Japanese.
This article explains what the data says, what each level of Japanese actually gets you, where language hits you on the job, and how to read the Japanese requirements in a job posting.
What the data says
I’m not a specialist in hiring from overseas, so instead of guessing, here’s what the surveys show.
1. Across all job postings for foreign workers, business-level Japanese is the norm. A 2024 analysis of about 19,000 job postings for foreign workers found that 94.2% required business-level Japanese or higher, and 92% of the people actually hired had business-level Japanese or higher. (GlobalPower / NINJA, via Mynavi News) This covers all job types, not only engineering. Engineering tends to be more flexible — but it shows the default expectation.
2. Among international developers already working in Japan, about half rarely or never use Japanese. In the TokyoDev Developer Survey 2025 (920 respondents), 24% never use Japanese at work and 25% use it only rarely. The other half use it sometimes (17%), frequently (14%) or always (21%). Keep in mind: TokyoDev’s audience leans toward English-speaking developers, so the real share across Japan is likely lower.
3. English-only jobs are mostly at non-Japanese companies. In the same survey, only 40% of developers who never use Japanese work for a Japan-headquartered company, compared to 83% of those who always use it.
4. Without Japanese, it’s very hard as a junior. TokyoDev’s summary is blunt: “there are almost no junior-friendly roles in Japan that require no Japanese.” English-only roles go mostly to experienced engineers.
5. The visa itself doesn’t require Japanese. The standard engineer visa (Engineer / Specialist in Humanities / International Services) has no Japanese-language requirement. The requirement comes from employers, not the law.
In short: you can get hired without Japanese — mainly if you’re experienced and aim at foreign-owned or international companies. If you’re junior or want to work at a typical Japanese company, Japanese is close to essential.
What each level opens up
The standard measure is the JLPT (Japanese-Language Proficiency Test), from N5 (beginner) to N1 (advanced). Companies use it as a rough filter, not a precise one.
| Your level | Jobs realistically open to you | What daily work looks like |
|---|---|---|
| No Japanese | Foreign-owned companies, a small number of Japanese tech companies with English-speaking engineering teams, some startups with international teams | Team works in English. You depend on others for anything outside the team: HR, other departments, contracts, your apartment. |
| N4–N3 (basic to conversational) | The above, plus some roles marked “English OK, some Japanese a plus” | You can follow simple conversations and chat messages. Meetings and documents are still hard. |
| N2 (business entry) | The large majority of engineering jobs posted in Japan start to open up. N2 is the most common requirement you’ll see. | You can work in Japanese with effort. Fast meetings and dense specs are still tiring. |
| N1 (advanced) | Almost everything, including roles facing clients and management tracks | Language stops being the bottleneck. |
Note: A JLPT certificate proves you can read and listen. The JLPT has no speaking or writing test. Interviewers know this, so expect them to check your actual speaking in the interview.
A visa bonus you might not know about
If you apply for the Highly Skilled Professional visa (a points-based visa with faster permanent residency), Japanese ability earns points: 15 points for N1, 10 points for N2. For many engineers, that’s the difference between qualifying and not.
Where Japanese hits you on the job
Even in an “English OK” role, language shows up in places you might not expect. From the inside, these are the usual pressure points:
| Situation | Why it’s hard without Japanese |
|---|---|
| Meetings | Fast, full of context and indirect expressions. Decisions are often made by reading the room, not by explicit statements. |
| Internal docs and wikis | Years of design documents, runbooks and specs written only in Japanese. |
| Chat (Slack, Teams) | Most threads are in Japanese. Machine translation helps, but misses nuance. |
| Other departments | Your team may speak English, but sales, legal, HR and other teams usually don’t. |
| Incidents and on-call | When production is down, the team communicates in its fastest language — and reports go up the chain in Japanese. |
| Hou-ren-sou (報連相: report, inform, consult) | Japanese workplaces expect constant, proactive reporting. It’s hard to do that well in a language you’re struggling with. |
MARU’s honne: my own team
In the team I currently work in, meetings, documents and chat are all in Japanese. There is no English layer at all — not a separate channel, not translated docs.
That means every row in the table above applies at once, not just one or two. When a posting says “English OK,” ask whether that’s true for the team you’d actually join — because at many Japanese companies, it looks like mine.
How to read the Japanese requirement in a job posting
Job postings in Japan often use phrases that don’t map neatly to JLPT levels. Here’s roughly how to read them:
| What the posting says | What it usually means |
|---|---|
| English only / No Japanese required / 日本語不要 | Team language is English. Check: is it the team’s language, or just the interview’s? |
| Japanese is a plus / 日本語できれば尚可 | Not required to get hired, but you’ll hit the pressure points above. |
| Daily conversation level / 日常会話レベル | Around N3. You can chat, but aren’t expected to lead meetings. |
| Business level / ビジネスレベル | Usually N2 or above plus real speaking ability. You’ll be expected to join meetings and write in Japanese. |
| Native level / ネイティブレベル | N1 and fluent. Often client-facing roles. |
Three questions to ask in the interview
- “What language does the team use day to day — in meetings, docs, and chat?”
- “When the team works with other departments, what language is that in?”
- “If I join with limited Japanese, what support is there — lessons, translation, a buddy?”
A company that has thought about these questions is a company that has actually integrated foreign engineers before. A vague answer is a warning sign.
If you’re choosing between “learn Japanese first” and “go now”
Both can work. The honest trade-offs:
Go now (little or no Japanese)
- Faster start, and you learn Japanese while living here
- Much smaller pool of jobs; more competition for each one
- Realistic mainly for experienced engineers — junior English-only roles are rare
- Risk: you get stuck in English-only roles and your options stay narrow
Get to N2 first
- Far more jobs open up, including better-paid roles at Japanese companies
- Takes serious time (often a year or more of consistent study, depending on where you start)
- Stronger position in interviews — and HSP visa points
MARU’s honne: what I’d look at if you applied with N3
The team I work in has never had an engineer from overseas, so I can’t tell you how that decision would play out — the data above is a better guide. But I can tell you what I personally look at in any candidate, and the Japanese level isn’t at the top of the list:
1. Can this person deliver results? Not “do they know the technologies,” but will they actually get things done on our team.
2. What kind of person are they? Character matters. We have to work with you every day.So if your Japanese is still at N3, don’t hide it — put your energy into proving those two things. Show concrete results, and let people see what you’re like to work with.
A middle path that works for many people: target English-friendly employers now, and study toward N2 seriously from day one. Your second job in Japan is where Japanese pays off the most.
Summary
- You can get hired without Japanese — but English-only jobs are a small part of the market, mostly at non-Japanese companies and for experienced engineers.
- Juniors without Japanese will find very few options.
- N2 is the level where most doors open. It’s the most common requirement in job postings.
- JLPT doesn’t test speaking. Interviews will.
- Even in English-only roles, Japanese shows up in meetings, docs, chat, other departments and incidents.
- Read job postings carefully: “business level” means more than a certificate.
- Ask what language the team actually works in.
- In the end, results and character decide the hire — not the JLPT level alone.
This article is general information, not legal or immigration advice. Visa rules change; always check the latest requirements with the Immigration Services Agency of Japan or your employer.
Want the inside view on how Japanese companies read your resume? Get the free guide “What Japanese Hiring Managers Actually Check in Your Resume” → [Newsletter signup]
Do You Need Japanese to Work in Japan as an Engineer?
Short answer: no, you don’t need it to get hired. But it decides how many doors are open to you — and how far you can go once you’re inside.
English-only engineering jobs in Japan are real. But the data says they’re a small part of the market — and they’re concentrated in specific kinds of companies and roles. Many engineering teams in Japan, including mine, run their daily work entirely in Japanese.
This article explains what the data says, what each level of Japanese actually gets you, where language hits you on the job, and how to read the Japanese requirements in a job posting.
What the data says
I’m not a specialist in hiring from overseas, so instead of guessing, here’s what the surveys show.
1. Across all job postings for foreign workers, business-level Japanese is the norm.
A 2024 analysis of about 19,000 job postings for foreign workers found that 94.2% required business-level Japanese or higher, and 92% of the people actually hired had business-level Japanese or higher. (GlobalPower / NINJA, via Mynavi News)
This covers all job types, not only engineering. Engineering tends to be more flexible — but it shows the default expectation.
2. Among international developers already working in Japan, about half rarely or never use Japanese.
In the TokyoDev Developer Survey 2025 (920 respondents), 24% never use Japanese at work and 25% use it only rarely. The other half use it sometimes (17%), frequently (14%) or always (21%).
Keep in mind: TokyoDev’s audience leans toward English-speaking developers, so the real share across Japan is likely lower.
3. English-only jobs are mostly at non-Japanese companies.
In the same survey, only 40% of developers who never use Japanese work for a Japan-headquartered company, compared to 83% of those who always use it.
4. Without Japanese, it’s very hard as a junior.
TokyoDev’s summary is blunt: “there are almost no junior-friendly roles in Japan that require no Japanese.” English-only roles go mostly to experienced engineers.
5. The visa itself doesn’t require Japanese.
The standard engineer visa (Engineer / Specialist in Humanities / International Services) has no Japanese-language requirement. The requirement comes from employers, not the law.
In short: you can get hired without Japanese — mainly if you’re experienced and aim at foreign-owned or international companies. If you’re junior or want to work at a typical Japanese company, Japanese is close to essential.
What each level opens up
The standard measure is the JLPT (Japanese-Language Proficiency Test), from N5 (beginner) to N1 (advanced). Companies use it as a rough filter, not a precise one.
| Your level | Jobs realistically open to you | What daily work looks like |
|---|---|---|
| No Japanese | Foreign-owned companies, a small number of Japanese tech companies with English-speaking engineering teams, some startups with international teams | Team works in English. You depend on others for anything outside the team: HR, other departments, contracts, your apartment. |
| N4–N3 (basic to conversational) | The above, plus some roles marked “English OK, some Japanese a plus” | You can follow simple conversations and chat messages. Meetings and documents are still hard. |
| N2 (business entry) | The large majority of engineering jobs posted in Japan start to open up. N2 is the most common requirement you’ll see. | You can work in Japanese with effort. Fast meetings and dense specs are still tiring. |
| N1 (advanced) | Almost everything, including roles facing clients and management tracks | Language stops being the bottleneck. |
Note: A JLPT certificate proves you can read and listen. The JLPT has no speaking or writing test. Interviewers know this, so expect them to check your actual speaking in the interview.
A visa bonus you might not know about
If you apply for the Highly Skilled Professional visa (a points-based visa with faster permanent residency), Japanese ability earns points: 15 points for N1, 10 points for N2. For many engineers, that’s the difference between qualifying and not.
Where Japanese hits you on the job
Even in an “English OK” role, language shows up in places you might not expect. From the inside, these are the usual pressure points:
| Situation | Why it’s hard without Japanese |
|---|---|
| Meetings | Fast, full of context and indirect expressions. Decisions are often made by reading the room, not by explicit statements. |
| Internal docs and wikis | Years of design documents, runbooks and specs written only in Japanese. |
| Chat (Slack, Teams) | Most threads are in Japanese. Machine translation helps, but misses nuance. |
| Other departments | Your team may speak English, but sales, legal, HR and other teams usually don’t. |
| Incidents and on-call | When production is down, the team communicates in its fastest language — and reports go up the chain in Japanese. |
| Hou-ren-sou (報連相: report, inform, consult) | Japanese workplaces expect constant, proactive reporting. It’s hard to do that well in a language you’re struggling with. |
MARU’s honne: my own team
In the team I currently work in, meetings, documents and chat are all in Japanese. There is no English layer at all — not a separate channel, not translated docs.
That means every row in the table above applies at once, not just one or two. When a posting says “English OK,” ask whether that’s true for the team you’d actually join — because at many Japanese companies, it looks like mine.
How to read the Japanese requirement in a job posting
Job postings in Japan often use phrases that don’t map neatly to JLPT levels. Here’s roughly how to read them:
| What the posting says | What it usually means |
|---|---|
| English only / No Japanese required / 日本語不要 | Team language is English. Check: is it the team’s language, or just the interview’s? |
| Japanese is a plus / 日本語できれば尚可 | Not required to get hired, but you’ll hit the pressure points above. |
| Daily conversation level / 日常会話レベル | Around N3. You can chat, but aren’t expected to lead meetings. |
| Business level / ビジネスレベル | Usually N2 or above plus real speaking ability. You’ll be expected to join meetings and write in Japanese. |
| Native level / ネイティブレベル | N1 and fluent. Often client-facing roles. |
Three questions to ask in the interview
- “What language does the team use day to day — in meetings, docs, and chat?”
- “When the team works with other departments, what language is that in?”
- “If I join with limited Japanese, what support is there — lessons, translation, a buddy?”
A company that has thought about these questions is a company that has actually integrated foreign engineers before. A vague answer is a warning sign.
If you’re choosing between “learn Japanese first” and “go now”
Both can work. The honest trade-offs:
Go now (little or no Japanese)
- Faster start, and you learn Japanese while living here
- Much smaller pool of jobs; more competition for each one
- Realistic mainly for experienced engineers — junior English-only roles are rare
- Risk: you get stuck in English-only roles and your options stay narrow
Get to N2 first
- Far more jobs open up, including better-paid roles at Japanese companies
- Takes serious time (often a year or more of consistent study, depending on where you start)
- Stronger position in interviews — and HSP visa points
MARU’s honne: what I’d look at if you applied with N3
The team I work in has never had an engineer from overseas, so I can’t tell you how that decision would play out — the data above is a better guide. But I can tell you what I personally look at in any candidate, and the Japanese level isn’t at the top of the list:
- Can this person deliver results? Not “do they know the technologies,” but will they actually get things done on our team.
- What kind of person are they? Character matters. We have to work with you every day.
So if your Japanese is still at N3, don’t hide it — put your energy into proving those two things. Show concrete results, and let people see what you’re like to work with.
A middle path that works for many people: target English-friendly employers now, and study toward N2 seriously from day one. Your second job in Japan is where Japanese pays off the most.
Summary
- You can get hired without Japanese — but English-only jobs are a small part of the market, mostly at non-Japanese companies and for experienced engineers.
- Juniors without Japanese will find very few options.
- N2 is the level where most doors open. It’s the most common requirement in job postings.
- JLPT doesn’t test speaking. Interviews will.
- Even in English-only roles, Japanese shows up in meetings, docs, chat, other departments and incidents.
- Read job postings carefully: “business level” means more than a certificate.
- Ask what language the team actually works in.
- In the end, results and character decide the hire — not the JLPT level alone.
This article is general information, not legal or immigration advice. Visa rules change; always check the latest requirements with the Immigration Services Agency of Japan or your employer.
Want the inside view on how Japanese companies read your resume? Get the free guide “What Japanese Hiring Managers Actually Check in Your Resume” →