About Japan Neighborhoods
Our Mission
Japan Neighborhoods makes official Japanese government data accessible to English speakers. We believe that people considering moving to, investing in, or simply learning about Japan deserve access to the same high-quality public data that Japanese residents have — without the language barrier.
Our focus is on objective, verifiable data rather than opinions. Every number on this site can be traced back to a specific government data source.
What We Cover
- Crime & Safety Data — 7 years of crime statistics (2018–2024) for 5,000+ Tokyo neighborhoods, broken down by crime type
- Safety Grades — A standardized grading system (A+ through F) based on per-capita crime rates
- Property Prices — Median transaction prices for condos, houses, and land by ward
- Demographics — Population and household data from the 2020 National Census
Data Sources
All data on this site comes from official Japanese government sources:
| Source | Data | Coverage |
|---|---|---|
| Tokyo Metropolitan Police Department (警視庁) | Annual crime statistics by neighborhood | 2018–2024, 5,000+ areas |
| Statistics Bureau of Japan (総務省統計局) | National Census — population, households | 2020 Census |
| Ministry of Land, Infrastructure, Transport and Tourism (MLIT / 国交省) | Real estate transaction prices via REINFOLIB API | 2018–2025 |
Crime data is published under the Creative Commons BY 4.0 license by the Tokyo Metropolitan Government Open Data Catalog. We attribute all data to its original source.
Methodology
Crime Rate Calculation
Crime rates are calculated as reported incidents per 1,000 residents using 2020 National Census population data. This per-capita normalization allows fair comparison between neighborhoods of different sizes.
Safety Grading Scale
| Grade | Label | Crime Rate (per 1,000) |
|---|---|---|
| A+ | Very Safe | ≤ 2.0 |
| A | Safe | 2.1 – 5.0 |
| B | Average | 5.1 – 10.0 |
| C | Below Average | 10.1 – 20.0 |
| D | High Crime | 20.1 – 50.0 |
| F | Very High Crime | > 50.0 |
Important Caveats
- Business districts (e.g., Kabukicho, Roppongi) may show elevated per-capita crime rates because their daytime/nighttime population far exceeds the residential population used for calculation.
- Low-population areas (fewer than 100 residents) are excluded from rankings to avoid statistical distortion.
- Crime statistics reflect reported/recognized offenses only and may not capture all incidents.
- Population data is from the 2020 Census and may not reflect recent demographic changes.
Data Freshness
- Crime statistics: Updated annually when the Tokyo Metropolitan Police Department releases finalized data (typically Q1 of the following year)
- Property prices: Updated quarterly via the MLIT REINFOLIB API
- Population data: Updated with each National Census (next: 2025)
Contact
For data corrections, partnership inquiries, or general questions, please reach out to us at hello@japanneighborhoods.com.