Due to the System Maintenance, SMOKA service will be suspended
on July 15, 2026 from 8:30 to 17:00 (JST).
Because processing large data requests such as HSC may take about half a day,
SMOKA data request will be unavailable from 17:00 on July 14, 2026 (JST).
We apologize for the inconvenience (June 26, 2026).
==> Now available. (July 15, 17:15 JST)


SMOKA account registered before 31 March 2026 was expired on 31 March 2026.
Please register again via User Registration . (April 1, 2026)