All corrections
Wikipedia June 11, 2026 at 05:38 PM

en.wikipedia.org/wiki/Quasi-Zenith_Satellite_System

4 corrections found

1
Claim
The sixth satellite failed to reach its orbit on 22 December 2025.
Correction

This mixes up QZS-6 and QZS-5. QZS-6 launched successfully on February 2, 2025 and entered service later that year; the satellite lost on December 22, 2025 was QZS-5.

Full reasoning

Official QZSS and JAXA sources show that QZS-6 was launched successfully on February 2, 2025. The Cabinet Office's QZSS site says QZS-6 was launched that day and was being prepared for service, and later announced that QZS-6's services started on July 18, 2025. Separately, JAXA states that the December 22, 2025 launch failure involved MICHIBIKI No. 5 (QZS-5), not QZS-6. So the article's sentence incorrectly says the sixth satellite failed on that date; the failed satellite was QZS-5.

3 sources
2
Claim
Last launch 2 February 2025
Correction

This is outdated. JAXA records show a later QZSS launch on December 22, 2025, when QZS-5 was launched aboard H3 F8.

Full reasoning

The infobox says the system's last launch was February 2, 2025. But JAXA's launch records list a later QZSS launch: MICHIBIKI No. 5 (QZS-5) was launched on December 22, 2025 aboard H3 F8. That launch failed to place the satellite into its planned orbit, but it was still a launch, so February 2, 2025 is not the system's most recent launch date.

2 sources
3
Claim
Total launches 6
Correction

This undercounts the number of QZSS launches. By JAXA's records, there had been seven QZSS launches by December 22, 2025.

Full reasoning

JAXA's launch records show QZSS launches on September 11, 2010 (QZS-1), June 1, 2017 (QZS-2), August 19, 2017 (QZS-3), October 10, 2017 (QZS-4), October 26, 2021 (QZS-1R), February 2, 2025 (QZS-6), and December 22, 2025 (QZS-5). That is seven launches in total. The December 2025 launch failed, but it was still a launch and is counted by JAXA in its launch records.

3 sources
4
Claim
It is not seen on the website as of 2026.
Correction

This is false. Q-ANPI is clearly listed on the official QZSS website in 2026, including dedicated overview and technical-information pages.

Full reasoning

As of 2026, Q-ANPI is plainly visible on the official QZSS website. The English service overview menu includes “QZSS Safety Confirmation Service (Q-ANPI)”, and the dedicated service page describes how Q-ANPI works and where it can be used. There is also a separate public Q-ANPI site. So the statement that Q-ANPI is 'not seen on the website as of 2026' is contradicted by the official website itself.

3 sources
Model: OPENAI_GPT_5 Prompt: v1.16.0