ISRO & Japanese scientists review mission Chandrayaan-5 preparation
Scientists and engineers from the Indian Space Research Organisation (ISRO) and the Japan Aerospace Exploration Agency (JAXA) met in Bengaluru for a technical interface review of the Chandrayaan-5/LUPEX (Lunar Polar Exploration) mission.
Discussions focused on interface coordination between the ISRO-built lander and the JAXA-built rover, including power sharing, data exchange, and communication protocols between the two systems.
The review also covered the scientific payloads that will fly aboard the rover, and interface requirements with Japan's H3 launch vehicle, involving experts from Mitsubishi Heavy Industries.
The mission remains targeted for launch around September 2028, per a recent Parliamentary Standing Committee report.
Chandrayaan-5/LUPEX: India's First Bilateral Lunar Lander-Rover Mission
LUPEX (Lunar Polar Exploration) is a joint ISRO-JAXA mission to the Moon's south polar region, distinct from India's earlier fully indigenous Chandrayaan missions in that responsibilities are split between two national space agencies rather than executed by ISRO alone.
Key Details
- ISRO is responsible for designing and building the lunar lander; JAXA is responsible for the rover (built with Mitsubishi Heavy Industries) that the lander will carry and deploy.
- JAXA will launch the mission on its H3-24L launch vehicle, meaning the launch itself will originate from Japan rather than from an Indian spaceport — a first for a flagship Indian lunar payload.
- Primary science objective is to search for and characterise water ice in a Permanently Shadowed Region (PSR) near the lunar south pole, assessing its abundance and accessibility for potential future resource use.
- Targeted launch window is around September 2028, as indicated in a Parliamentary Standing Committee report on the Department of Space.
The Bengaluru technical interface meeting is part of the standard pre-Preliminary Design Review process for bilateral missions, where the two agencies lock down the physical and data interfaces between systems built independently in different countries before detailed design proceeds.
India's Lunar Exploration Trajectory: Chandrayaan-1 to Chandrayaan-5
Chandrayaan-5/LUPEX is the latest step in a lunar programme that has progressively built capability — from a search for water on the lunar surface, through a failed soft-landing attempt, to a successful landing, and now to an international, resource-focused mission.
Key Details
- Chandrayaan-1 (2008): India's first lunar mission, an orbiter whose data (via NASA's Moon Mineralogy Mapper instrument) provided the first confirmed evidence of water molecules on the lunar surface.
- Chandrayaan-2 (2019): comprised an orbiter, lander (Vikram), and rover (Pragyan); the orbiter succeeded and continues to operate, but the lander crashed during its final descent.
- Chandrayaan-3 (2023): launched 14 July 2023, its Vikram lander achieved a soft landing near the lunar south pole on 23 August 2023, making India the fourth country to achieve a soft lunar landing and the first to land near the south pole.
- Chandrayaan-4 is planned as a lunar sample-return mission (India-only, no confirmed launch date at the time of writing); Chandrayaan-5/LUPEX follows it as India's first bilateral lander-rover mission with a foreign space agency.
LUPEX builds directly on the soft-landing expertise demonstrated by Chandrayaan-3, applying it to a more technically demanding bilateral mission where an Indian-built lander must safely deploy a foreign-built rover.
India-Japan Space Cooperation as a Strategic Partnership Marker
Joint space missions between India and Japan sit within a wider bilateral "Special Strategic and Global Partnership," reflecting how technology cooperation is increasingly used as a marker of strategic alignment between Indo-Pacific partners.
Key Details
- ISRO and JAXA have collaborated on lunar science since at least the mid-2010s, when LUPEX was first conceived as a joint concept study; the mission has since moved through design reviews to the current technical interface stage.
- Cooperation in the LUPEX mission also draws on instruments and inputs associated with other international partners, reflecting a broader multi-agency approach to lunar exploration common to major 2020s Moon missions.
The review meeting is a concrete, near-term data point for a partnership that Indian and Japanese leaders have repeatedly flagged at the political level; unlike purely diplomatic statements, technical interface reviews indicate the mission is progressing through actual engineering milestones toward its 2028 target.
- Chandrayaan-5/LUPEX targeted launch: around September 2028 (per Parliamentary Standing Committee report).
- ISRO builds the lander; JAXA (with Mitsubishi Heavy Industries) builds the rover; launch will be on JAXA's H3-24L vehicle.
- Mission target: water ice characterisation in a Permanently Shadowed Region near the lunar south pole.
- Chandrayaan-3 (2023) achieved India's first successful soft landing, near the lunar south pole, making India the fourth country to soft-land on the Moon.