Family-level launch record combining canonical variants, historical missions, public cadence forecasts, and available payload performance specs.
Historical missions are grouped by actual launch year. Forecast cadence uses family-level launch-rate rows.
| Year | Historical missions | Forecast launches |
|---|---|---|
| 2024 | 2 | 0 |
| 2026 | 1 | 1 |
| 2027 | 0 | 1 |
| 2028 | 0 | 1 |
| 2029 | 0 | 1 |
| 2030 | 0 | 1 |
| 2031 | 0 | 1 |
| 2032 | 0 | 1 |
| 2033 | 0 | 1 |
| 2034 | 0 | 1 |
| 2035 | 0 | 1 |
| 2036 | 0 | 1 |
| 2037 | 0 | 1 |
| 2038 | 0 | 1 |
| 2039 | 0 | 1 |
| 2040 | 0 | 1 |
| 2041 | 0 | 1 |
Payload capacity by variant and target orbit when structured capacity rows are available.
| Variant | Orbit | Capacity | Altitude | Inclination | Source |
|---|---|---|---|---|---|
Kairos | SSO | 150 kg | 500 km | Unknown | Space One official KAIROS service page |
Latest launched missions using variants in this family.
| Mission | Variant | Launch |
|---|---|---|
| Launch 2026-F04 | Kairos | Mar 5, 2026 |
| Launch 2024-F04 | Kairos | Dec 18, 2024 |
| Launch 2024-F01 | Kairos | Mar 13, 2024 |
Upcoming mission rows with announced launch timing.
| Mission | Variant | Announced |
|---|
Canonical variants rolled up into this launch vehicle family.
| Variant | Stages | Missions | Status |
|---|---|---|---|
Kairos | Not stated | 3 | Active |
1 launch location represented.
| Year | Location | Launches | Confidence | Basis |
|---|---|---|---|---|
| 2026 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2027 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2028 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2029 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2030 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2031 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2032 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2033 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2034 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2035 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2036 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2037 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2038 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2039 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2040 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
| 2041 | Spaceport Kii | 1 | 25% | Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot. |
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
No forecasted missionsNo upcoming announced mission rows are linked to this vehicle family. |
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
Catalog-completeness placeholder for active KAIROS family; not used by latest forecast capacity snapshot.
The project will carry special decals with support messages from 3,000 residents of Kushimoto and Nachikatsuura towns in Wakayama Prefecture on the Kairos Rocket No. 3.
Space One Co., Ltd. launched the 'Local Message Launch Project' on October 28, 2025, to deliver messages from local residents into space through the Kairos Rocket No. 3.
The Kairos rocket reached over 110 kilometers from Earth, transporting the Dainichi Nyorai and a mandala into outer space for the first time.
SpaceOne Co., Ltd. operates its own rocket launch site, 'Spaceport Kii', in Kushimoto, Wakayama Prefecture, and has attempted to launch its 'Kairos' rocket two times.
Kairos is designed to place up to 250 kg into a 500-kilometer orbit at an inclination of 33 degrees.
Space One confirmed the 2024-12-17 Kairos launch failed and committed to investigating the cause as soon as possible.
Video of the 2024-12-17 Kairos launch showed the vehicle tumbling and producing a corkscrew contrail after losing attitude control.
The Kairos rocket lost control and failed about two minutes after its 2024-12-17 liftoff.
Kairos is designed to place up to 150 kg into sun-synchronous orbit.
Space One was selected under the JAXA-SMASH initiative despite its Kairos solid rocket exploding seconds after liftoff earlier 2024-03.
Kairos was developed to serve the small satellite market with a payload capacity of 150 kg to sun-synchronous orbit.
The Kairos rocket, built by Japanese company Space One, exploded about five seconds after liftoff at 10:01 p.m. Eastern from Spaceport Kii on the southern part of Honshu.
The 2024-03-12 Kairos launch was carrying an experimental satellite to test responsive space capabilities for the Japanese military.
Space ONE’s Kairos four-stage light-lift solid rocket will attempt to reach orbit as soon as 2024-03-13 Japan time.
Space One’s satellite will be carried into space on a Kairos solid fuel rocket launched from Space Port Kii on Friday, 2024-03-08.
QuantX Labs is executing the KAIROS mission to launch into low Earth orbit and demonstrate a next-generation optical atomic clock.
The KAIROS mission is designed to provide reliable, protected, and precise timing signals to critical systems on Earth and in deep space.