At IAC 2026, India and Japan Share a Stage, Not Yet a Deal

India Japan Kaizen — Space Industry Series, Part 4

Part 3 of this series tracked the two gaps Part 1 first named between Japan and India's space sectors — talent and manufacturing — and left one of them visibly closing and the other almost exactly where it started. It also pointed to the next place those threads might meet in person: the 77th International Astronautical Congress (IAC), running 5-9 October in Antalya, Türkiye. That congress opened today. This part checks in on what a record-breaking week in Turkey, and a separate conversation already underway in Delhi, actually add up to for Japan and India specifically — and what, a week after Part 3, still hasn't happened.

A Record Congress, By Every Measure But One

IAC 2026 opened with numbers no previous edition has matched: a record 8,325 abstracts submitted from 108 countries, the highest totals in the congress's history both in volume and in geographic reach. Part 3 already named India's 288 abstracts and Japan's 261 among the strongest showings of any country at the event. What's new this week is the scale building around them: representatives from India's IN-SPACe are attending alongside Japanese and Chinese delegations and roughly 30 international astronauts, and organizers expect more than 10,000 participants from over 70 countries across the five days — reportedly the largest international scientific gathering Türkiye has ever hosted. That is a genuinely large stage for two countries whose delegations, as Part 3 put it, had not shared one since this series began. What the record doesn't capture is whether any of that density turns into a signed India-Japan commercial agreement. As of opening day, none had been announced.

The Session Putting Japan's Playbook on the Main Stage

The clearest sign of what Japan intends to showcase in Antalya is already on the official programme: a plenary titled "Cis-Lunar Architecture in Practice: Lessons and Leadership from Japan." That session is a direct continuation of ground Part 3 covered in detail — Mitsubishi Heavy Industries' contract to launch ispace's Mission 3 ULTRA lander on its H3 rocket, the first time a Japanese-built lander will fly on a Japanese-built rocket, now scheduled for 2028 rather than the 2026 originally floated in Part 2's coverage of the ispace-Skyroot-HEX20 memorandum. A plenary built around that story is a genuine answer to the question Part 2 first raised about where the two countries' delegations would next share a stage. What it isn't, at least on paper, is a joint India-Japan session — it's Japan presenting its own cis-lunar roadmap, with an Indian delegation in the room rather than on the panel. Worth watching over the congress's remaining four days is whether that changes in the sidebar meetings IAC is built around, the kind that don't show up on the published programme until after they happen.

The Same Week, a Different Stage: Delhi's Kautilya Conclave

While Antalya was filling up, a separate conversation was happening in Delhi. The 5th Kautilya Economic Conclave, running 4-6 October, gave Kazuto Suzuki, director of Japan's Institute of Geoeconomics think tank, a platform to tell reporters on 4 October that the India-Japan high-tech partnership is gaining visible momentum in two sectors specifically: semiconductors and space. On the semiconductor side, he pointed to Japanese companies reaching out to Tata Semiconductor and Tata Electronics about a prospective Gujarat fab — the same chip corridor this series' sister Investment Bridge Series has tracked in its own reporting on SEMICON India and the roughly $12.5 billion India-Japan semiconductor figure. On space specifically, he described continuing cooperation in satellite projects and lunar exploration, without naming anything beyond what LUPEX and the three deals Part 2 already covered. It's commentary, not a new agreement — but it's notable that a Japanese geoeconomics specialist chose to group space with semiconductors, unprompted, in the same week IAC opened, rather than treating it as the junior partner in the relationship.

Momentum Without Yet a Deal

Put Antalya and Delhi side by side and the picture is consistent with everything Part 3 already found: visibility and goodwill are compounding faster than contracts. The regulatory door Part 2 described in detail — up to 100% automatic-route FDI in satellite component manufacturing — is still open, and still unused by any named Japanese company. Mitsubishi Electric's demonstrated willingness to build at real industrial scale in India, cited in Part 3 for its ₹2,100 crore Chennai facility, still hasn't pointed itself at Thoothukudi, where Agnikul and Skyroot's own integration and testing facilities keep rising regardless. A week and one record-breaking congress after Part 3, that is the one number that hasn't moved at all.

What's Missing

IAC runs through 9 October — four more days in which a sidebar meeting, a signed MOU, or a manufacturing announcement timed to the event could still land, and this series will be watching for it. What's missing right now is exactly what Part 3 flagged: an announced Japanese facility, joint venture, or anchor investment tied specifically to India's space sector, at a moment when the case for one has never been stronger — Pixxel's scale, Skyroot and Agnikul's new facilities, and an FDI route that's been open for two and a half years with no space-specific taker yet. For the mid-sized component supplier or facility manager actually walking the halls in Antalya this week, that gap is still the opening a community-level introduction could close faster than either country's institutions are moving on their own.

If you're in Antalya this week, or working in India-Japan space manufacturing, supply chains, or talent from anywhere else — get in touch. This is exactly the kind of introduction India Japan Kaizen wants to help make.

This is Part 4 of India Japan Kaizen's Space Industry Series, publishing weekly. Part 3 covered the talent pipeline that's closing and the manufacturing gap that hasn't; Part 5 will check in once IAC closes on 9 October, covering whatever bilateral meetings or manufacturing announcements actually came out of the week — or confirming that, once again, none did.