Explained: How the bullet train became a hybrid of Japanese and Indian technology
In one line: The Mumbai-Ahmedabad bullet train, begun with Japan in 2017, is now a hybrid of Japanese track design, European signalling and an Indian-built train, running years late and at nearly double the original cost.
Published 24 October 2026. Written by Pratidin from the reports linked at the end; every fact checked by a separate review before publishing. How we work
The Indian Express explained on 24 October 2026 how India's first high-speed rail line, the 508-km Mumbai-Ahmedabad corridor, has moved away from the plan of a complete Japanese Shinkansen system. Work began in September 2017 as a partnership with Japan. The project is now a hybrid: Japanese track design, a European signalling system and Indian-made trains. Japanese experts continue to oversee drawing approvals, designs, construction schemes and quality control. The first section is now expected to open by December 2027, against an original target of 2022, and the estimated cost has nearly doubled from about ₹1.08 lakh crore to around ₹2 lakh crore.
The delays came from the Covid-19 pandemic, land acquisition problems in Maharashtra, including after a change of State government in 2019, and early differences between Indian and Japanese aims. Japan expected to supply the whole Shinkansen package, including trains and signalling, on concessional loan terms. India wanted to avoid dependence on a single costly imported system and to prioritise local manufacturing and technology transfer. When Japan's E5 trainset, originally intended for India, was being phased out and its successor, the E10, was unlikely to be available before 2034, India chose to build its own train. The signalling contract went to a European-Indian joint venture in June 2025, and BEML in Bengaluru is building an indigenous high-speed train, the B28, with a top operating speed of 250 km/h.
The project is run by the National High Speed Rail Corporation Limited (NHSRCL), whose equity is held 50% by the Centre through the Ministry of Railways and 25% each by Gujarat and Maharashtra. The Japan International Cooperation Agency (JICA) funds 81% of the original cost through an Official Development Assistance loan at 0.1% interest over 50 years, with a 15-year moratorium. The line has 12 stations and is designed for 320 km/h, with a 21-km tunnel that includes India's first undersea tunnel, about 7 km under Thane Creek. India's stated aims in choosing the hybrid model were flexibility, cost control and domestic manufacturing; Japanese experts have cautioned against running systems that were not designed together on the same corridor.
Prelims facts
- The 508-km Mumbai-Ahmedabad high-speed rail line began in September 2017; its first section is now expected by December 2027, against an original 2022 target.
- Its estimated cost has nearly doubled, from about ₹1.08 lakh crore to around ₹2 lakh crore.
- The project is now a hybrid: Japanese track design, a European signalling system (contract awarded June 2025) and the indigenous B28 train built by BEML.
- JICA funds 81% of the original cost through an ODA loan at 0.1% interest over 50 years with a 15-year moratorium.
- NHSRCL's equity is 50% Centre and 25% each Gujarat and Maharashtra; the line has 12 stations and a 7-km undersea tunnel under Thane Creek.
Quick recall
- Length of the Mumbai-Ahmedabad high-speed rail corridor?
- 508 km.
- When did the bullet train project begin?
- September 2017.
- Expected opening of the first section, and the original target?
- December 2027; the original target was 2022.
- Original and current cost estimates?
- About ₹1.08 lakh crore originally; around ₹2 lakh crore now.
- Terms of the JICA loan?
- 81% of original cost, 0.1% interest, 50-year tenure, 15-year moratorium.
- Who is building India's indigenous high-speed train, and what is it called?
- BEML, Bengaluru; the B28, with a top operating speed of 250 km/h.
- NHSRCL equity pattern?
- Centre 50% (Ministry of Railways), Gujarat 25%, Maharashtra 25%.
- Where is India's first undersea rail tunnel?
- Under Thane Creek, about 7 km, part of a 21-km tunnel on the bullet train line.
Prelims practice question
With reference to the Mumbai-Ahmedabad High Speed Rail project, consider the following statements:
1. The loan from the Japan International Cooperation Agency carries an interest rate of 0.1% with a 50-year tenure.
2. The equity of the implementing company is shared equally between the Centre and the governments of Gujarat and Maharashtra, one-third each.
3. The project includes an undersea tunnel under Thane Creek.
Which of the statements given above are correct?
- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
Show answer
Answer: (c) 1 and 3 only. Statement 1 is correct: the JICA ODA loan is at 0.1% over 50 years with a 15-year moratorium. Statement 2 is incorrect: NHSRCL's equity is 50% Centre (Ministry of Railways) and 25% each for Gujarat and Maharashtra. Statement 3 is correct: the 21-km tunnel section includes a 7-km undersea tunnel under Thane Creek.
Use this in UPSC Mains: previous-year questions
Recurring theme: Financing and indigenisation of large infrastructure projects in India
- How to use this
Use the bullet train as a contrast: India's largest rail project is financed by a sovereign concessional loan and a Centre-State SPV, not PPP, showing the limits of private capital.
- JICA lends 81% of the bullet train's original cost at 0.1% interest over 50 years with a 15-year moratorium.
- NHSRCL, a special purpose vehicle, is owned 50% by the Centre and 25% each by Gujarat and Maharashtra.
- Cost has nearly doubled from about ₹1.08 lakh crore to around ₹2 lakh crore.
The B28 train, built by BEML after India chose not to wait for Japanese trainsets, is a current example of indigenous manufacturing in strategic infrastructure.
Mains practice question
India's first high-speed rail project has moved from a full Japanese system to a hybrid model with an indigenous train. Discuss the reasons and the trade-offs involved. (250 words)
Model answer
The 508-km Mumbai-Ahmedabad high-speed rail line, begun in September 2017 as a Shinkansen project with Japan, is now a hybrid of Japanese track design, European signalling and an Indian-built train, with its first section expected by December 2027.
Reasons for the shift
- Rolling stock gap: Japan's E5 trainset was being phased out and the E10 was unlikely before 2034.
- Self-reliance: India wanted local manufacturing and technology transfer rather than one costly imported package; BEML is building the B28 (250 km/h).
- Diversified sourcing: signalling went to a European-Indian joint venture in June 2025.
- Delays: Covid-19 and land acquisition problems in Maharashtra pushed the timeline past the original 2022 target.
Gains
- Domestic capability in high-speed rolling stock for future corridors.
- Less dependence on a single foreign supplier.
- Japanese oversight of design and quality retained.
Costs and risks
- Estimated cost has nearly doubled from about ₹1.08 lakh crore to around ₹2 lakh crore.
- Japanese experts caution about integrating systems not designed together.
- The B28's 250 km/h is below the 320 km/h the line is designed for.
- Need to keep a flagship India-Japan partnership on track.
Financing frame
- JICA ODA loan for 81% of the original cost at 0.1% over 50 years; equity 50% Centre, 25% each Gujarat and Maharashtra.
Way forward
- Rigorous independent safety certification of the integrated system.
- Firm land and contract timelines; transparent revised cost estimates.
- Keep Japan engaged for later corridors.
The detour has cost time and money, but if the integration works, India gains a high-speed rail capability of its own.
The basics
Why this matters
Infrastructure is not only about concrete. It is also about who owns the technology, who finances it and who can build the next one. India's first bullet train shows all three questions at once, and that is why it fits GS3 topics on infrastructure, investment models and indigenisation of technology.
The line in numbers
The Mumbai-Ahmedabad corridor runs 508 km from Bandra Kurla Complex in Mumbai to Sabarmati in Ahmedabad, with 12 stations. About 90% of it is elevated. It is designed for 320 km/h and a fastest journey of about 2 hours 7 minutes.
How it is paid for
The project is a special purpose vehicle, National High Speed Rail Corporation, owned by the Centre and two States. Most of the money is a soft loan from Japan, explained at Official Development Assistance loans.
- 1JICA ODA loan81% of the original cost, at 0.1% interest over 50 years with a 15-year moratorium
- 2Government of IndiaFunds the rest; holds 50% of NHSRCL equity through the Ministry of Railways
- 3Gujarat25% of NHSRCL equity
- 4Maharashtra25% of NHSRCL equity
The long detour
The plan in 2017 was a complete Shinkansen system. That changed step by step.
- September 2017Project launched as a partnership with Japan
- 2019Change of government in Maharashtra slows land acquisition
- 2020 onwardsCovid-19 pandemic adds delays
- June 2025Signalling contract awarded to a European-Indian joint venture
- December 2027Expected opening of the first section (original target: 2022)
Why India built its own train
Japan's E5 trainset, originally meant for India, was being phased out, and the next model, the E10, was unlikely before 2034. India decided not to wait. BEML in Bengaluru is building the B28, with a top operating speed of 250 km/h. That is below the line's 320 km/h design speed but far above conventional Indian trains.
- One supplier for track, trains and signals
- Systems designed to work together
- Concessional finance tied to the package
- Japanese track design, European signals, Indian train
- Builds domestic manufacturing capability
- Integration and safety certification become harder
The trade-off
The hybrid path has cost time and money. India's aim is to build a domestic industry for future corridors. Japanese experts have warned about running systems not designed together on one line. Whether the bet pays off depends on how well the pieces fit.
Go deeper
Why it matters for UPSC
GS3 covers infrastructure (railways), investment models and indigenisation of technology; GS2 covers India-Japan ties. This project is the standard example for all four.
The core idea
The line was conceived as a complete Shinkansen system, financed mostly through Japanese Official Development Assistance loans and built by a special purpose vehicle, the National High Speed Rail Corporation. Delays, the phasing out of the Japanese trainset meant for India and India's push for self-reliance led to a mixed model. BEML is building the B28 train, and a European-Indian joint venture won the signalling contract in June 2025.
Numbers and dates to remember
- 508 km, 12 stations, designed for 320 km/h.
- September 2017: project begins; original target 2022; first section now expected by December 2027.
- Cost: about ₹1.08 lakh crore originally, around ₹2 lakh crore now.
- JICA loan: 81% of original cost, 0.1% interest, 50 years, 15-year moratorium.
- NHSRCL equity: Centre 50%, Gujarat 25%, Maharashtra 25%.
- B28 top operating speed: 250 km/h.
Where to go next
- Shinkansen: the Japanese system the project started from.
- Official Development Assistance loans: how the project is financed.
- National High Speed Rail Corporation: who builds and owns it.
Go deeper: was the detour worth it?
The case for the hybrid model. India's goal was never only one line. A domestic high-speed train, the B28, gives India a base for future corridors without importing every trainset. Sourcing signalling separately avoids dependence on one supplier. Japanese experts still oversee design and quality, keeping a link to Shinkansen know-how.
The case against. Cost has nearly doubled and the opening has slipped from 2022 to December 2027 for the first section. Japanese experts have cautioned against operating systems that were not designed together on the same corridor. The B28's 250 km/h is below the 320 km/h design speed, so the line may not reach its full potential at first.
The finance angle. Official Development Assistance loans from JICA cover 81% of the original cost at 0.1% interest over 50 years, terms no commercial lender would offer. Japan expected these terms to come with its full Shinkansen package, including trains and signalling, so India's move to a hybrid model was a significant departure from the original understanding.
The institutional angle. The National High Speed Rail Corporation is a joint Centre-State company. Land acquisition depended on State cooperation, and the 2019 change of government in Maharashtra slowed it, showing how federal politics shapes infrastructure timelines.
What to watch. Safety certification of the integrated system, the trial runs of the B28, revised cost figures, and how India and Japan cooperate on later corridors.
Shinkansen
The Japanese high-speed system the project began with.
In one line: Shinkansen is Japan's high-speed rail network, which opened in 1964 and became the model for India's first bullet train.
How it works
Shinkansen lines run on dedicated tracks separate from ordinary railways, with their own trains, signalling and maintenance practices designed as one system.
Its role in India
The Mumbai-Ahmedabad line was planned in 2017 around Shinkansen technology, with Japan expected to supply trains and signalling. Japan's E5 trainset was meant for India, but it was being phased out and the newer E10 was unlikely before 2034. India then chose an indigenous train and a European signalling system, while keeping Japanese track design and Japanese oversight of designs and quality control.
Where to go next
Official Development Assistance loans
How the bullet train is financed on very soft terms.
In one line: Official Development Assistance (ODA) loans are government-to-government loans on concessional terms, with far lower interest and longer repayment than commercial borrowing.
Concessional terms
Concessional finance means favourable conditions: low interest, long tenure and a grace period before repayment starts. The Japan International Cooperation Agency (JICA) handles Japan's ODA.
The bullet train loan
JICA funds 81% of the Mumbai-Ahmedabad project's original cost of about ₹1.08 lakh crore through an ODA loan at 0.1% interest over 50 years, with a 15-year moratorium, so repayment runs over 35 years. The Government of India funds the rest.
Why it is in the news
Japan expected to supply the full Shinkansen package on concessional terms, while India preferred local manufacturing. That difference is part of why the project became a hybrid.
Where to go next
National High Speed Rail Corporation
The Centre-State company that builds and will run the line.
In one line: The National High Speed Rail Corporation Limited (NHSRCL) is the special purpose vehicle that implements the Mumbai-Ahmedabad high-speed rail project.
Ownership
Its equity is held 50% by the Government of India through the Ministry of Railways, and 25% each by the governments of Gujarat and Maharashtra. This joint structure means the project depends on cooperation between the Centre and both States.
The project it runs
The 508-km line runs from Bandra Kurla Complex in Mumbai to Sabarmati in Ahmedabad, with 12 stations. About 90% is elevated, and a 21-km tunnel section includes India's first undersea tunnel, about 7 km under Thane Creek.
Why it is in the news
Land acquisition delays in Maharashtra and the shift to a hybrid technology model have pushed the first section's opening to December 2027.
Where to go next
Take the 24 October 2026 quiz: 30 Prelims-style questions with answers