Service Disruptions

The service is not available.

Please check X (formerly Twitter) @jpx_JQuants for information on the outage.

The website does not load.

If no outage has been announced, the issue may be caused by your environment. Please try the following:

• Check whether the site loads in an incognito (private browsing) window
• If you use a VPN or proxy, try switching it off. Check whether security software is blocking the connection in its settings or logs (if you change any settings, be sure to restore them after checking)
• Disable browser extensions
• Clear your browser cache
• Check whether the site loads on a different network connection

Where can I check for outage or maintenance information?

Outage and maintenance information is available on X (formerly Twitter) @jpx_JQuants and the announcements section of the J-Quants API website. For urgent inquiries, please contact us via the inquiry form after checking the current status.

How long does it take to restore service?

Although we aim to restore the service as soon as possible, it may take some time depending on the situation. Please note that since this service delivers historical data, most failures will be restored on the next business day or later.

Will I get a refund if the service is suspended?

In principle, no refunds will be made. Please understand that this service achieves low-cost data delivery without guaranteeing high service uptime.

However, the conditions under which refunds may be issued, such as prolonged service suspension, are set out in the Terms of Service. Please refer to the Terms of Service for details. No refunds will be issued for free plans.