Due to equipment inspection, our websites―including the ISAS websites, the Visitor Center, ISAS GATE, Cosmos Blog, and SOKENDAI Space and Astronautical Science―will be temporarily unavailable during the following period.

Sunday, April 19, 2026, 6:00 AM (JST) to
Monday, April 20, 2026, 1:30 PM (JST)

* Please note that the schedule may change depending on the maintenance work.

We apologize for any inconvenience and appreciate your understanding and cooperation.