Institute of Space and Astronautical Science

Flight record

Counts are launches filed under ISAS’s own name in The Space Devs’ Launch Library register. They are not a count of missions or payloads: a spacecraft that flew on a contracted vehicle is credited to the operator that flew it.

Who flies for them, and who they fly for

An operator owns the rocket and runs the count, and it is the operator’s name the launch schedule filters by. A customer funds the mission, supplies the payload and buys the ride. Plenty of organisations are both. ISAS is counted below in whichever role the current manifest actually gives it.

No scheduled flight in the current window names ISAS while being operated by somebody else.

How this is counted: a scheduled launch is treated as a customer flight when this organisation’s name or abbreviation appears in the launch name, mission name or programme and somebody else is flying it. Mission descriptions are not searched, and the window is one batch of the next launches worldwide, reaching to 2026-12-31 00:00:00Z — so both counts are a floor, not a complete manifest.

About ISAS

ISAS is a Japanese national research organization of astrophysics using rockets, astronomical satellites and interplanetary probes which played a major role in Japan's space development.

Upcoming launches

“T-0 known to” is the register’s own precision on the launch time — a date good only to the month is shown as such rather than counted down as if it were exact. A go-probability appears only where the operator published one for that flight; Delta-V does not calculate it and it is not a forecast made here.

Common questions

How many launches has Institute of Space and Astronautical Science flown?

Institute of Space and Astronautical Science has 32 launches on record under its own name, of which 24 succeeded and 8 failed. The register counts launches flown under an operator's own name, not missions or payloads it contributed to.

What is Institute of Space and Astronautical Science's success rate?

Institute of Space and Astronautical Science has a lifetime launch success rate of 75.0%, calculated as 24 successful flights out of 32 attempts. Its current run is 1 consecutive successes.

When is Institute of Space and Astronautical Science's next launch?

Institute of Space and Astronautical Science is not flying anything inside Delta-V's current manifest window, which reaches to 2026-12-31 00:00:00Z.

Does Institute of Space and Astronautical Science fly its own rockets, or buy launches from another operator?

Institute of Space and Astronautical Science has 32 launches flown under its own name in the launch register. It is not the operator on any flight in the current manifest window. An operator owns the rocket and runs the count; a customer funds the mission, supplies the payload and buys the ride. The operator filter on the launch schedule lists only the former, which is why a well-known agency can be central to a flight and still not appear on it.

Where is Institute of Space and Astronautical Science based?

Institute of Space and Astronautical Science is based in Japan and the register classifies it as a government operator.