Key Facts
A high school in Obihiro, Hokkaido, has disclosed that a teacher mistakenly uploaded sensitive student health information to a cloud platform accessible to students. The incident occurred at Obihiro Sanjo High School on April 23, 2025, and involved personal data from health checkups for 80 students across grades 1 to 3. The uploaded file was accessible to 239 first-year students for approximately 10 minutes before the error was identified and corrected.
The file in question contained details about students who had not submitted urine samples for health examinations. It included class information, attendance numbers, and, in some cases, notes explaining that certain female students were unable to submit samples due to menstruation. The teacher responsible for the upload intended to share the file with colleagues but inadvertently made it accessible to students due to an operational error.
Four students reported viewing the file during the brief period it was available. The school has confirmed that there is no evidence of the data being shared online or any secondary misuse of the information.
On April 24, the school held a meeting with parents to address the situation and issued an apology. Principal Sumio Sano expressed regret, stating, “We deeply apologize for the inconvenience caused by our failure to manage personal information appropriately. Moving forward, we will strengthen our protocols to prevent such incidents from recurring.”
The school has pledged to implement stricter measures for handling personal data to ensure better security and prevent future errors. At this time, no further consequences or damages have been reported.
For more details, visit the original report: HBC News.
Summary
On April 23, 2025, a teacher at Obihiro Sanjo High School in Hokkaido mistakenly uploaded a file containing sensitive student health information to a cloud platform accessible to students. The file, which included data from health checkups for 80 students across grades 1 to 3, was accessible to 239 first-year students for approximately 10 minutes before the error was corrected. The document detailed students who had not submitted urine samples for health examinations, including class information, attendance numbers, and notes indicating that some female students were unable to submit samples due to menstruation.
Four students reported viewing the file during the brief period it was available. The school confirmed that there is no evidence of the data being shared online or misused. On April 24, the school held a meeting with parents to apologize for the incident. Principal Sumio Sano expressed regret, stating, “We deeply apologize for the inconvenience caused by our failure to manage personal information appropriately. Moving forward, we will strengthen our protocols to prevent such incidents from recurring.”
The school has pledged to implement stricter measures to ensure better data security. No further consequences or damages have been reported.
For more details, visit the original report: HBC News.
