In Search of Origins

How has Earth become a planet filled with life?
What kind of information is necessary to predict the future of the planet Earth?
What kind of laws of physics control the evolution of the universe since its birth?
To deepen our understanding of the solar system and the universe, research and development of spacecraft that enables scientific observation and exploration are essential. JAXA plays a pioneering role in expanding the areas of human exploration through an unbroken line of these activities.

The operation status of satellites/probes is basically categorized into the following phases: "Under development", "In Operation", "Latter Phase In Operation" ,"Post operation" and "Transferred".

  • In Operation: Operation during regular mission period (including initial operation period after launch)
  • Latter Phase In Operation: Operation following the completion of the regular mission period operation. When completing the regular mission period operation, the condition of the satellite/probe is checked to decide whether a latter phase in operation is required.

Major Research and Development

GREAT2, GRound station for deep space Exploration And Telecommunication phase 2

This is a ground station built in Saku City,Nagano Prefecture for the purpose of enabling telecommunications with deep space explorationprobes.

Scientific Ballooning

A huge balloon is a flying object for scientific observations and space engineering tests in the same manner as satellites and sounding rockets.

Research on Lunar, Planetary Science

Studying planets and the moon leads us to understand the birth of the Earth and the origin of the solar system and life. Observing planets and the moon through various methods and analyzing acquired data from every angle are imperative for these studies.

Research on Space Plasma, X-Rays, and Infrared-Rays

Capturing phenomena in the solar system and planets beyond it and their surrounding area provides us with clues to solve the mysteries of space. Therefore, it is essential to acquire as much information as possible by seizing various radio waves including X-rays, infrared lights and plasmas in addition to visible lights.

Research on Space Technologies

JAXA promotes space engineering research to stably perform space exploration activities "further", "with more flexibility" and "in wider directions."

Astronomical Observation Satellites

In Operation

X-Ray Imaging and Spectroscopy Mission (XRISM)

XRISM is a new X-ray astronomical satellite which observes plasma in stars and galaxies. With a new generation of X-ray imaging spectroscopy technologies, XRISM will resolve mysteries regarding the formation of the universe.

Latter Phase In Operation

Spectroscopic Planet Observatory for Recognition of Interaction of Atmosphere "HISAKI" (SPRINT-A)

World’s first space telescope to observe planets!

Solar Physics Satellite "HINODE" (SOLAR-B)

The HINODE, an observatory satellite to study the impact of the Sun on the Earth High expectations for new solar observations through international efforts by the United Kingdom, the United States and Japan

INnovative-technology Demonstration Experiment "REIMEI" (INDEX)

Cutting-edge small satellite developed in-house

Exploration of energization and Radiation in Geospace "ARASE" (ERG)

To elucidate high-energy electrons that repeat their generation and disappearance.

Under Development

High-sensitivity Solar Ultraviolet Spectroscopic Satellite (SOLAR-C)

This satellite is designed to elucidate how the Sun's high-temperature plasma is created and how it affects the Earth and planets by precise spectroscopic observation of ultraviolet radiations emitted from the Sun through the onboard telescope with unprecedented high sensitivity. Japan is leading the development of the mission in cooperation with the United States and European countries.

Operation Completed

Aurora Observation Satellite "AKEBONO" (EXOS-D)

An aurora observation satellite that observed the physical phenomena taking place in geospace while collecting detailed data in collaboration with the ground stations

X-ray Astronomy Satellite "Hitomi" (ASTRO-H)

New space image to be elucidated by X-ray astronomy

X-ray Astronomy Satellite "Suzaku" (ASTRO-EII)

Suzaku to probe into black holes and galaxy clusters to study their structure and evolution.

Infrared Imaging Satellite "AKARI" (ASTRO-F)

AKARI: Seeking an understanding of the formation and evolution of galaxies

Lunar and Planetary Exploration Spacecraft

In Operation

Mercury Exploration Mission "BepiColombo"

BepiColombo will elucidate the mysteries of Mercury

Hera-Mission to a binary asteroid system for planetary defense and science

Along with NASA’s DART (Double-Asteroid Redirection Test) mission, the technology required for planetary defense will be demonstrated for the first time in history, in addition to investigating planetary formation and evolution processes.

Latter Phase In Operation

Asteroid Explorer "Hayabusa2"

Hayabusa2 to clarify the origin and evolution of the solar system as well as life matter

Venus Climate Orbiter "AKATSUKI" (PLANET-C)

AKASTUKI will elucidate the mysteries of Venus, Earth’s twin sister.
Japan will initiate the beginning of a new era of Venusian exploration.

Under Development

Martian Moons Exploration (MMX)

Mission that discloses the origin and evolution of the red planet

Deep Space Exploration Technology Demonstrator (DESTINY+)

DESTINY+ is a deep space mission that unites engineering and science objectives.

Past Projects

Missions Launch date~End of mission
IKAROS 2010年05月21日~2025年05月15日
SLIM 2023年09月07日~2024年08月23日
GEOTAIL 1992年07月24日~2022年11月28日
HITOMI(ASTRO-H) 2016年02月17日~2016年04月28日
KAGUYA(SELENE) 2007年09月14日~2009年06月11日
AKARI(ASTRO-F) 2006年02月22日~2011年11月24日
ASTRO-G *The decision was made to cancel.
SUZAKU 2005年07月10日~2015/June
LUNAR-A *The decision was made to cancel.
HAYABUSA(MUSES-C) 2003年05月09日~2010年06月13日
ASTRO-E 2000年02月10日(*The M-V-4 failed to put ASTRO-E satellite into orbit.)
NOZOMI(PLANET-B) 1998年07月04日~2003年12月09日
HALCA(MUSES-B) 1997年02月12日~2005年11月30日
SFU 1995年03月18日~1996年01月13日
EXPRESS 1995年01月15日~1995年01月15日
ASCA(ASTRO-D) 1993年02月20日~2001年03月02日
YOKOH(SOLAR-A) 1991年08月30日~2004年04月23日
HITEN(MUSES-A) 1990年01月24日~1993年04月11日
AKEBONO(EXOS-D) 1989年02月22日~2015年04月23日
GINGA(ASTRO-C) 1987年02月05日~1991年11月01日
SAKIGAKE(MS-T5) 1985年01月08日~1999年01月07日
SUISEI(PLANET-A) 1985年08月19日~1992年08月20日
OHZORA(EXOS-C) 1984年02月14日~1988年12月26日
TENMA(ASTRO-B) 1983年02月20日~1988年12月17日
HINOTORI(ASTRO-A) 1981年02月21日~1991年07月11日
TANSEI-4(MS-T4) 1980年02月17日~1983年05月13日
HAKUCHO(CORSA-b) 1979年02月21日~1985年04月15日
KYOKKO(EXOS-A) 1978年02月04日~1992年08月02日
JIKIKEN(EXOS-B) 1978年09月16日~1985
TANSEI-3(MS-T3) 1977年02月19日~1977年03月08日
TAIYO(SRATS) 1975年02月24日~1980年06月29日
TANSEI-2(MS-T2) 1974年02月16日~1983年01月23日
DENPA(REXS) 1972年08月19日~1972年08月22日
TANSEI(MS-T1) 1971年02月16日~1971年02月23日
SHINSEI 1971年09月28日~1973/June
OHSUMI 1970年02月11日~1970年02月12日

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