RobotRisk › Nishi Tokyo Bus Co. (Tokyo Metropolitan Government autonomous bus demonstration) › ~Dec 2025
Autonomous bus accident in Hachioji (Takao) traced to system defect, Tokyo announces recurrence-prevention measures
S2 · ~Dec 2025 · Nishi Tokyo Bus Co. (Tokyo Metropolitan Government autonomous bus demonstration) · Hachioji, Tokyo, Japan
Record
| Company | Nishi Tokyo Bus Co. (Tokyo Metropolitan Government autonomous bus demonstration) |
| Industry | Other |
| Type(s) | crash |
| Date | ~Dec 2025 (month precision) |
| Time of day | not documented |
| Location | Hachioji, Tokyo, Japan |
| Severity | (minor injury or single-unit damage) |
| Scale | 1 bus |
| Confidence | medium |
| Verified flag | Yes - independently re-checked against the cited source |
Summary
An autonomous (Level 2) demonstration bus in Hachioji's Takao area struck a roadside tree in August 2025 after a software defect caused it to read a stale (22-second-old) position and jerk the wheel sharply; three people suffered minor injuries. Tokyo Metropolitan Government announced the cause in November 2025 and recurrence-prevention measures on 2025-12-22.
Primary source
Publisher: NHK News · Retrieved: 2026-09-16
Supporting source rows (1)
| Date | Supporting source row | Publisher | Link |
|---|---|---|---|
| ~Dec 2025 | Autonomous bus accident in Hachioji (Takao) traced to system defect, Tokyo announces recurrence-prevention measures | NHK News | NHK News |
Other context
crash context
Nishi Tokyo Bus Co. (Tokyo Metropolitan Government autonomous bus demonstration) industry position
Related incidents
Other Nishi Tokyo Bus Co. (Tokyo Metropolitan Government autonomous bus demonstration) entries
- None on file.
Report a correction
Also from Critical Systems Analysis: CSA - functional safety engineering · Company directory · FSTalent - functional safety jobs