{"id":"bf459530-b666-415c-8b4e-576d1ce1ca85","slug":"tier-iv-kumamoto-bus-rear-ended-2025-01","kind":"collision","headline":"TIER IV autonomous bus rear-ended by public bus during Kumamoto test run","summary":"On January 30, 2025, a TIER IV Minibus 2.0 autonomous bus operating under a trial in Kumamoto City was rear-ended by a following public bus at the Umayabashi intersection near Kumamoto City Hall. The autonomous bus was operating normally at the time. No injuries were reported among the 4 passengers on the autonomous bus or 15 on the following vehicle. The incident caused damage requiring repairs and delayed the public trial launch from February 10 to March 21, 2025. Sensors and autonomous driving system were confirmed unaffected.","occurredAt":"2025-01-30T06:34:00.000Z","reviewStatus":"unreviewed","modelId":"cdcb0582-9fe1-4ae8-9ab2-968a54040a11","deploymentId":null,"companyId":null,"aliases":[],"collisionRisk":"none","reviewNote":null,"severity":"minor","rootCauseCategory":null,"rootCauseDetail":null,"affectedUnitsCount":null,"affectedUnitsBasis":null,"remediationStatus":"remediated","regulatoryAction":"none","regulatoryBody":null,"propertyDamageEstimateUsd":null,"damageEstimateBasis":null,"bodilyInjurySeverity":null,"fatalityCount":null,"lossCostClass":null,"sourceQualityTier":null,"oshaRecordable":null,"oshaCaseNumber":null,"rootCauseDisclosed":null,"publicDisclosureDate":null,"insuranceClaimPublic":null,"formFactor":null,"latitude":null,"longitude":null,"autonomyClass":null,"legalOutcomeClass":"unknown","createdAt":"2026-08-09T17:05:46.625Z","updatedAt":"2026-08-09T17:05:46.625Z","model":{"id":"cdcb0582-9fe1-4ae8-9ab2-968a54040a11","companyId":"8c8a9f0b-110b-4d16-aad1-20798e85da1b","modelName":"Autoware","slug":"autoware","description":"Autoware is the world's first open-source software stack for autonomous driving, built on ROS and maintained by TIER IV and the Autoware Foundation. It provides a full-stack AD system including perception, planning, and control, and is used by 200+ companies worldwide in applications ranging from robotaxis to autonomous buses and logistics trucks.","formFactor":"av","industryVertical":null,"environment":null,"maturityStage":"commercial","lifecycleState":"active","supersededByModelId":null,"specs":{},"manufacturerSerial":null,"reviewStatus":"unreviewed","sources":[{"url":"https://autoware.org/","label":"Autoware Foundation","title":"Autoware Foundation","mediaType":"article","sourceName":"Autoware Foundation"}],"aliases":[],"collisionRisk":"low","reviewNote":null,"manufacturerTermForTeleop":null,"keyFacts":[],"createdAt":"2026-08-09T17:05:18.937Z","updatedAt":"2026-08-09T17:05:18.937Z","unitsInFieldClaimed":null,"unitsInFieldVerified":null,"unitsManufacturedClaimed":null,"unitsManufacturedVerified":null,"unitsAsOf":null,"unitsSource":null,"salesModel":null,"priceUndisclosedSince":null,"autonomyClass":null,"autonomyStatement":null,"autonomyStatementSource":null,"demoForensics":null,"exportControlClass":null,"minCommitment":null,"warrantyTerms":null,"serviceModel":null,"productionRateClaimed":null,"productionRateEvidenced":null,"teleopRatioDisclosed":null,"interventionRateDisclosed":null},"deployment":null,"company":null,"derived":{"status":"active"},"sources":[{"id":"7f0fe978-1411-4b7b-99db-73d35b53cc05","incidentId":"bf459530-b666-415c-8b4e-576d1ce1ca85","url":"https://www.sumitomocorp.com/en/easia/news/important/group/20250317","label":"Sumitomo Corporation","publishedAt":"2025-03-17T00:00:00.000Z","notes":null,"title":null,"sourceName":"Sumitomo Corporation","mediaType":"article","videoId":null,"channel":null,"durationSec":null,"timestampSec":null,"createdAt":"2026-08-09T17:05:46.625Z","updatedAt":"2026-08-09T17:05:46.625Z"}],"responses":[],"statusEvents":[{"id":"faff0bb9-216f-4548-bd33-e5f71e084637","incidentId":"bf459530-b666-415c-8b4e-576d1ce1ca85","status":"active","reason":null,"source":"agent:recon","effectiveAt":"2026-08-09T17:05:47.788Z","createdAt":"2026-08-09T17:05:47.788Z"}],"jsonLd":{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://registry.deploy.report/incidents/tier-iv-kumamoto-bus-rear-ended-2025-01","url":"https://registry.deploy.report/incidents/tier-iv-kumamoto-bus-rear-ended-2025-01","headline":"TIER IV autonomous bus rear-ended by public bus during Kumamoto test run","description":"On January 30, 2025, a TIER IV Minibus 2.0 autonomous bus operating under a trial in Kumamoto City was rear-ended by a following public bus at the Umayabashi intersection near Kumamoto City Hall. The autonomous bus was operating normally at the time. No injuries were reported among the 4 passengers on the autonomous bus or 15 on the following vehicle. The incident caused damage requiring repairs and delayed the public trial launch from February 10 to March 21, 2025. Sensors and autonomous driving system were confirmed unaffected.","identifier":"bf459530-b666-415c-8b4e-576d1ce1ca85","datePublished":"2025-01-30T06:34:00.000Z","articleSection":"collision","publisher":{"@id":"https://deploy.report/#organization"},"author":{"@id":"https://deploy.report/#organization"}},"framework_metadata":{"framework_schema_version":"0.1.0","verification_status":"unreviewed","maturity_stage":null,"lifecycle_state":null,"architectural_position":{"cohort":null,"sub_cohorts":[]},"within_cohort_verified_vs_claimed_pair":null,"cap_flags":[],"verification_depth":{"sources_count":1,"primary_source_types":[]}}}