PrivateFounded 1990 · Chiyoda, Tokyo, JapanUpdated Aug 31, 2026

Japan Manned Space Systems Corporation (JAMSS)

Provides and operates multi-purpose payload facilities for microgravity research (e.g., KLABOX on Haven-1) and supports human spaceflight operations, astronaut training, and commercial utilization of ISS Kibo.

Company website

Private Japanese aerospace company providing astronaut training, ISS Kibo module operations and experiment coordination, safety assurance, and multi-purpose payload facilities such as KLABOX for microgravity research on commercial stations including Haven-1.

Principal supply-chain role05 · In-Space Infrastructure

Servicing, refueling, stations, manufacturing, and the systems that make sustained activity possible.

Principal supply-chain role05 · In-Space Infrastructure

Suppliers, customers & partners

Suppliers & service providers to Japan Manned Space Systems Corporation (JAMSS)

Vast— customer · strategic partner2 connectionsTell me more

JAMSS provides and flies a multi-purpose payload facility for microgravity research on Haven-1 (announced April 2025).

Relationship research record

Vast provides access to its commercial LEO station Haven-1 and partner ecosystem that enables JAMSS to install and operate a multi‑purpose payload facility (KLABOX) and other payloads aboard Haven-1; JAMSS announced an MOU/partnership to accelerate commercial space utilization in Japan and Asia and to leverage Haven-1 for microgravity experiments.

Relationship research record

SpaceX— launch services supplierTell me more

SpaceX provided cargo launch services (SpaceX CRS-19) that carried JAMSS’s Kirara protein-crystallization experiment payloads (Kirara‑1 mission) to the ISS, enabling JAMSS’s microgravity experiment operations and returned samples.

Relationship research record

Japan Manned Space Systems Corporation (JAMSS) customers & supported companies

JAXA— customer / operations clientTell me more

JAMSS supplies operation, utilization support, astronaut training, and safety/product assurance services for JAXA’s Japanese Experiment Module (Kibo) on the ISS — JAMSS is a commercial operator/servicer to JAXA programs and users of Kibo.

Relationship research record

Japan Manned Space Systems Corporation (JAMSS) program partners

JAXA— program partner / enabling agencyTell me more

JAXA provides the Japanese Experiment Module (JEM, “Kibo”) infrastructure and program context that JAMSS operates and supports; JAMSS performs ISS Kibo operations, utilization support, and training under the JEM program enabling JAMSS’s business in ISS utilization.

Relationship research record

Interstellar Lab— program/technology partner (ecosystem)Tell me more

Interstellar Lab was named alongside JAMSS as an additional payload partner for Haven‑1 (Vast announcement), indicating an ecosystem collaboration enabling plant/biotech payload work aboard commercial stations that complements JAMSS’s payload offerings.

Relationship research record

Vast— program partner / payload providerTell me more

JAMSS provides and will fly a multi‑purpose payload facility (KLABOX / sub‑payload modules) and related payload services for microgravity research aboard Vast’s Haven‑1 commercial space station (announced as a payload partner for Haven‑1).

Relationship research record

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Interstellar Lab SpaceX

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JAXA Vast

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