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Hiring in Japan is as much a scheduling question as a sourcing one. At UTC+9, that means a short morning or evening overlap with Western Europe and little natural overlap with the US West Coast. That decides whether you are hiring someone who joins your stand-up or someone who hands off to it.
Developers in Japan cluster in Tokyo, USA, Osaka and Kyoto. City counts cover every indexed developer there, not only the ones using AI, so treat them as where the country's engineering population sits rather than a count for this skill.
AI developers in Japan most often pair it with Python (89.5%), JavaScript (78.9%) and HTML (77.2%).
Developer cities in Japan
All indexed developers per city, across every skill.
- Tokyo7,860
- USA4,459
- Osaka527
- Kyoto353
- Tokyo326
- Yokohama305
- Fukuoka304
- Japan262
- Chiba174
- Kanagawa170
Counts are developers in the indexed profile set.
Other skills hired in Japan
Each links to the same country breakdown for that technology.
- JavaScript10,159
- Python9,359
- HTML8,568
- TypeScript6,300
- Bash / Shell5,201
- Java5,083
- C++4,854
- CSS4,688
- Ruby4,444
- C4,135
- Go3,876
- Jupyter3,116
- PHP2,998
- C#2,486
Counts are developers in the indexed profile set.
What AI developers in Japan also use
Share of this group who also work with each technology.
- Python255 · 89.5%
- JavaScript225 · 78.9%
- HTML220 · 77.2%
- TypeScript170 · 59.6%
- C++145 · 50.9%
- CSS120 · 42.1%
- Jupyter115 · 40.4%
- Java110 · 38.6%
- Go95 · 33.3%
- Bash / Shell90 · 31.6%
- C90 · 31.6%
- LLMs80 · 28.1%
Counts are developers in the indexed profile set.
What AI developers in Japan look like
Measured across the profiles in this group, not self-reported.
- Median public contributions, last 12 months
- 375
- Median public repositories
- 49
- Median followers
- 29
- Have a linked LinkedIn profile
- 40.4%
- Flagged as open to work on GitHub
- 43.9%
Years of experience
- 0–2 years11%
- 3–5 years16%
- 6–9 years30%
- 10+ years44%
Shares of the profiles in this group where experience could be derived.
Sample profiles from Japan
Real indexed developers, reduced to ranges and derived labels so no individual is identifiable.
- Contributions / year
- 3,500–5,000
- Public repositories
- 150–250
- Followers
- 0–10
- Contributions / year
- 2,000–3,500
- Public repositories
- 150–250
- Followers
- 1,000–2,500
- Contributions / year
- 0–50
- Public repositories
- 50–75
- Followers
- 50–100
- Contributions / year
- 100–250
- Public repositories
- 5–10
- Followers
- 10–25
- Contributions / year
- 250–500
- Public repositories
- 20–35
- Followers
- 100–250
- Contributions / year
- 500–1,000
- Public repositories
- 75–100
- Followers
- 100–250
Figures are shown as ranges and identifying details are removed. Full profiles, including GitHub handles and contact details, are available to signed-in users.
Frequently asked questions
How many AI developers are there in Japan?
282 developers based in Japan show AI in their public GitHub work, which is 0.9% of all 30,977 AI developers in the index.
Which cities in Japan have the most developers?
Tokyo (7,860), USA (4,459), Osaka (527), Kyoto (353) and Tokyo (326). These are counts of all indexed developers in each city.
Do working hours in Japan overlap with my team?
At UTC+9, that means a short morning or evening overlap with Western Europe and little natural overlap with the US West Coast.
How active are AI developers in Japan?
The median developer in this group made 375 public contributions in the last year across 49 public repositories, with a median of 29 followers.
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