System Maintenance (Dec 20, 2016, 10:00 a.m. - 05:00 p.m. (JST))

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  • Maintenance
Nov 18, 2016

NBDC websites (*, * and are temporarily unavailable due to system maintenance. The schedule could be changed without notice depending on the progress of the maintenance. We apologize for the inconvenience.

Dec 20, 2016, 10:00 a.m. - 05:00 p.m. (JST)

The following sites are available during the maintenance hours.
NBDC Portal Site (
NBDC RDF Portal (

Thank you for your cooperation.

Inquiries & opinions

Feel free to contact us if you have any questions about this website or the web-based services that NBDC provides or wish to consult with us regarding research data or databases.