11-Year Roadkill Records from Citizen Reports in Tsukuba, Japan

Shoma Jingu presents a dataset of 14,249 roadkill records collected over 11 years (2005–2007 and 2016–2025) in Tsukuba, Japan. The data was generated via an 'unintended citizen science' process where citizens reported carcasses to municipal administration for professional collection. This dataset provides planar coverage of the entire 284 km² administrative area.

Use Cases

• Analyzing spatiotemporal patterns of wildlife mortality based on 11 years of georeferenced records.
• Assessing the impact of urbanization on local biodiversity based on planar coverage of an entire city.
• Monitoring the invasion of non-native species based on a three-tier taxonomic verification process.
• Evaluating the reliability of administrative biodiversity monitoring systems based on a dataset with a missing-data proxy.

Strengths

• 14,249 records providing substantial observational data.
• 11-year temporal coverage across two periods (2005–2007 and 2016–2025).
• Comprehensive planar spatial coverage of a 284 km² administrative area.
• Methodological strengths include dual-resolution georeferencing, a missing-data proxy, and three-tier taxonomic verification.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for specific modeling tasks.
• Data reflects geographic bias, being specific to Tsukuba, Japan.

Provenance

Source

figshare, author Shoma Jingu.

Collection Method

Citizen reports to municipal administration triggering collection by contracted professionals ('unintended citizen science').

Time Range

2005–2007 and 2016–2025.

Freshness

Last updated 2026-04-24 07:25:26; freshness should be verified.

Geography

Tsukuba, Japan (284 km² administrative area).