Japan has entered the reusable rocket era. The Japan Aerospace Exploration Agency (JAXA) successfully launched and landed its RV-X experimental reusable rocket prototype on July 11, 2026, at the Noshiro Rocket Testing Center in Akita Prefecture, northeastern Japan. The brief but critical flight marks Japan’s first step toward operational rocket reusability, a capability that has reshaped the global launch market.
The RV-X (Reusable Vehicle eXperiment) lifted off vertically under power from a single engine, climbed to approximately 11 meters (36 feet), translated horizontally about 16 meters (52 feet) while maintaining an upright attitude, and then executed a controlled vertical landing on the opposite side of the concrete pad. The entire flight lasted about 40 seconds.
“This test flight went exactly as planned,” said Takashi Ito, JAXA’s reusable rocket project manager, during an online briefing from the test center. The successful outcome brought visible relief to the engineering team after years of ground testing and preparation.
A small hop with big implications
The RV-X is a modest vehicle by design. Standing 7.3 meters (24 feet) tall with a diameter of 1.8 meters (5.9 feet), it resembles nothing so much as an oversized industrial tank perched on four shock-absorbing landing legs. That resemblance is intentional. The vehicle’s stubby proportions mirror those of SpaceX’s Starhopper prototype from 2019, which similarly kicked off the Starship development program with a brief, single-engine hop.
Starhopper’s first untethered jump reached about 20 meters (65 feet) straight up and down. The RV-X’s debut was more ambitious in some respects: it combined vertical ascent with horizontal translation, demonstrating lateral control during powered flight. The vehicle’s engine, which Ito described as “hardworking,” has already completed 165 combustion tests on the ground, suggesting a robust design that JAXA and Mitsubishi Heavy Industries have refined through years of joint development.
The road to CALLISTO
The RV-X is not an end in itself. It is a precursor to CALLISTO (Cooperative Action Leading to Launcher Innovation in Stage Toss-back Operations), a joint project involving JAXA, France’s CNES, and the German Aerospace Center (DLR). CALLISTO will be a single-stage vertical-takeoff, vertical-landing (VTVL) demonstrator powered by a 40-kilonewton LOX/LH2 engine, designed to validate the technologies needed for operational reusable launch vehicles.
CALLISTO’s flight test campaign is planned from Europe’s Spaceport in French Guiana, with the first flights expected in 2027. The vehicle is designed to perform at least five missions, including high-energy flights that simulate the conditions of an orbital booster return. The RV-X tests at Noshiro allow JAXA and its partners to practice the ground operations, maintenance workflows, and flight procedures that CALLISTO will require.
“Reusable rockets require consideration of operational feasibility,” JAXA notes on its RV-X project page. “By repeatedly verifying maintenance, operation, vehicle movement and launch pad setup using an actual experimental vehicle in preparation for flight tests, we were able to establish operational procedures that will contribute to the repeated operation of future rockets.”
Why Japan needs reusability
Japan’s current flagship rocket, the H3, entered service in 2023 and represents a significant cost improvement over its predecessor, the H-2A, which was retired in 2025. But the H3 was not designed for reusability, and two of its eight launches have not been fully successful. As a single-use vehicle, it cannot match the cost-per-kilogram economics of reusable systems like SpaceX’s Falcon 9.
SpaceX has been landing and reusing Falcon 9 first stages since 2015, and the company now routinely flies boosters on multiple missions, dramatically reducing launch costs. Blue Origin’s New Glenn achieved its first successful landing in 2025, and China’s Long March 10B recovered its first stage for the first time in July 2026, just one day before the RV-X flight. Japan does not want to be left behind.
The Japanese government has identified stable, commercially competitive space transportation as a national priority, crucial for both the civil space program and national security. Developing a reusable launcher to eventually replace the H3 is a key strategic objective.
Private sector competition heats up
While JAXA leads the government-funded effort, Japan’s private space sector is also advancing. Interstellar Technologies Inc. (IST), a Hokkaido-based startup founded in 2013, is developing the ZERO orbital launch vehicle. Unlike the RV-X/CALLISTO family, which uses cryogenic liquid hydrogen and oxygen, the ZERO rocket burns liquid biomethane and liquid oxygen, using IST’s COSMOS engine in a gas-generator cycle.
ZERO is a two-stage vehicle standing 32 meters tall, capable of delivering up to 1,000 kilograms to low Earth orbit. IST has already secured payload customers for its maiden flight and raised significant funding, including a 7 billion yen (approximately $44 million) investment from Woven by Toyota in early 2025. The company has also partnered with Germany’s Exolaunch to strengthen its service offerings in Asia.
IST’s suborbital vehicle, MOMO, has reached space three times, making IST the first and only private Japanese company to accomplish that feat. The ZERO orbital debut, originally targeted for 2025, has been postponed but remains in active development with an expanded management team and growing workforce exceeding 160 people.
Honda R&D Co., a subsidiary of Honda Motor Co., also conducted successful reusable rocket flight tests in 2025, marking the first such achievement by a Japanese private company.
What comes next for RV-X
JAXA has a clear roadmap for RV-X. The next test flight will target an altitude of approximately 100 meters (330 feet), with lateral translation and hover before a powered landing. That progression mirrors the Starhopper flight campaign, which advanced from a 20-meter hop to a 150-meter flight and eventually to a 20-kilometer high-altitude test within the span of a year.
After the low-altitude campaign, JAXA plans to work toward higher altitudes and more demanding flight profiles, potentially including return-to-launch-site maneuvers and simulated booster recovery trajectories. The lessons learned from RV-X and CALLISTO will directly inform the design of Japan’s next-generation reusable flagship rocket.
For now, the 40-second flight at Noshiro represents something Japan has never achieved before: a rocket that lifted off, maneuvered, and returned to Earth under control, ready to fly again. It is a small hop for a 7-meter test vehicle, but a significant stride for a nation determined to compete in the new era of reusable spaceflight.
Correction note: An earlier version of this article referenced Interstellar Technologies as the builder of RV-X. The RV-X vehicle is a JAXA and Mitsubishi Heavy Industries project. Interstellar Technologies is a separate Japanese launch startup developing its own ZERO orbital rocket.
Clark – 1ban.news