BASF and Mitsubishi are not partners on rice carbon credits in India — they run two separate, competing programmes. That correction turns out to matter, because both sit on top of a carbon-credit methodology that only recently survived a near-total market collapse: Verra invalidated 37 rice-methane projects and 4.5 million credits in 2024 — effectively all the rice credits that existed. This piece untangles who's actually doing what in India, what the carbon-credit science underneath it looked like before and after the collapse, and a third, unrelated thread — Japan's agrivoltaic rice-paddy research — that shares a crop but not a market.
Rice Cultivation and Innovation
Three threads, not one story. Rice-methane carbon credits, corporate rice-carbon programmes in India, and Japan's solar-paddy research all involve rice and all made news recently — but they're three separate developments with different institutions, different markets, and in Japan's case, no carbon-credit angle at all. This piece keeps them distinct rather than blending them into a single "rice sustainability" narrative that would overstate how connected they actually are.
Searching for a Mitsubishi-BASF rice-carbon partnership turns up no such thing, because it doesn't exist. What exists are two separate corporate programmes running in India at the same time, both built on the same underlying agronomic technique — Alternate Wetting and Drying (AWD) — and both aimed at the same voluntary carbon market, but with no shared ownership between them:
| Programme | Partners | Scope |
|---|---|---|
| BASF – ICAR-CRRI trial | BASF, Indian Council of Agricultural Research – Central Rice Research Institute | Bilateral, Odisha & Jharkhand, 2-year AWD emissions trial (started August 2025), feeding into BASF's global target of a 30% GHG cut from rice cultivation |
| TGRA alliance | Bayer, GenZero (Temasek), Shell, Mitsubishi | Four-company consortium, AWD + Direct Seeded Rice (DSR) across 9 Indian states, 10,000+ farmers enrolled covering 25,000+ hectares |
Both programmes are chasing the same prize — verified rice-methane carbon credits — and both are pointed at the same methodology family, but they're structured as rival corporate initiatives rather than a joint venture. Getting this distinction right matters for a specific reason: whichever programme actually gets credits registered and sold first will have proven out the commercial model the other one is also betting on.
Underneath both India programmes sits the science IRRI (the International Rice Research Institute) helped codify: AWD cuts methane emissions from flooded rice paddies by roughly 30-70% by periodically letting fields dry instead of staying continuously flooded, which starves the anaerobic bacteria that produce methane. IRRI climate scientists contributed the stratification methodology — grouping farms by cultivation-condition patterns — behind Gold Standard's rice carbon methodology, launched in July 2023 and still active today, giving smallholder farmers a route to monetise emissions reductions.
Verra's rice credits told a very different story. In August 2024, Verra — the largest voluntary carbon standard — invalidated 37 rice-methane projects representing 4.5 million credits, effectively all (99.9%) of the rice credits it had ever issued, after a 17-month review found integrity failures its own auditors had missed. Rice credits had made up nearly a third of all agricultural credits in the voluntary carbon market before the collapse, with the large majority of projects in China. Verra also sanctioned four verification bodies over the failures. Verra's replacement methodology, VM0051, launched in early 2025 with stronger additionality tests (including remote-sensing verification) — but as of mid-2025, only one project had registered under it, and it had not yet issued a single credit.
That context changes how to read both India programmes: they aren't operating in a mature, trusted market. They're trying to build credible supply into a market that just had almost its entire prior rice-credit inventory thrown out for not being real. Whether AWD-based credits from India end up trusted the way the old CDM-era China credits weren't is still an open question neither BASF's nor the TGRA alliance's programme has answered yet — both are still at the trial/enrollment stage, not the credits-issued stage.
Separately from any of this, a University of Tokyo-led team published results in 2025 (Journal of Photonics for Energy) from an agrivoltaic pilot at Miyada-mura in Nagano Prefecture: a dual-axis sun-tracking solar array suspended three metres above a working rice paddy, its panels adjusting tilt daily and seasonally — favouring more light-through during the growing season, maximising power generation in the off-season. Over two growing seasons, rice yield under the panels reached 75% and then 85% of a conventional nearby paddy's yield, improving as the team fine-tuned the light-shade balance, while still meeting Japan's highest grain-quality grade. The panels themselves generated close to 44,000 kWh a year, an efficiency (961.4 kWh per installed kW) that compares well against similar European agrivoltaic systems.
This sits inside a larger national programme: Japan had approved 6,137 agrivoltaic sites covering 1,361.6 hectares of farmland by the end of fiscal 2023, and energy company Idemitsu has built the country's first next-generation 2MW agrivoltaic plant. None of this is a carbon-credit story — it's a land-use and renewable-generation story, testing whether the same hectare can grow rice and generate electricity at once without giving up too much of either.
On the water-level question specifically: the published Miyada-mura results describe careful management of light and shade via panel angle, not a jointly-optimised water-depth protocol published alongside it — water-depth and evapotranspiration management in paddies is real, active research in Japan, but based on the sourcing found for this piece, it reads as a separate research thread rather than something this particular agrivoltaic pilot integrated and reported jointly with its light-optimisation results.
What this piece does not establish. Neither the BASF-ICAR-CRRI trial nor the TGRA alliance has publicly reported carbon credits actually issued or sold as of the sourcing gathered here — both are described in their own announcements as trials/enrollment-stage programmes, and this piece could not find confirmation that either has cleared VM0051 registration. Whether India's AWD credits will face the same additionality scrutiny that sank the Verra-era China projects is not yet knowable and this piece does not predict it. And per Section 3, a genuinely joint water-level/light-level optimisation study specific to this Japanese pilot was not found; the water-depth research that exists on paddy irrigation appears to be a related but distinct body of work.
About this article: Researched, written and edited by Umashankar Triplicane Dwarakanathan, with AI research assistance; every figure is meant to trace to the primary source cited. See the Editorial Policy for how sourcing, AI use and corrections work.
