# Explained: How the bullet train became a hybrid of Japanese and Indian technology

URL: https://upsc.help/current-affairs/2026-10-24/bullet-train-hybrid-model-explained/
Date: 24 October 2026 (2026-10-24)
Source: Indian Express, Explained
UPSC papers: GS3, GS2
Publisher: upsc.help (Pratidin), free and open-source UPSC Civil Services current affairs. Not affiliated with UPSC. Every fact was checked against the source reports by a separate review before publishing.

**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.

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?

(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

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.

## UPSC previous-year questions this connects to

- UPSC Mains 2022, GS3: Why is Public Private Partnership (PPP) required in infrastructural projects ? Examine the role of PPP model in the redevelopment of Railway Stations in India. (https://upsc.help/pyq/gs3/#q361)
  How to use this story in the answer: 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.
- UPSC Mains 2015, GS3: "Success of Make in India program depends on the success of Skill India programme and radical labour reforms." Discuss with logical arguments. (https://upsc.help/pyq/q007-success-make-india-program-depends-success-skill/)

## 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.

## The long detour
The plan in 2017 was a complete Shinkansen system. That changed step by step.

## 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.

## 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.

## Sources

- https://superkalam.com/current-affairs/24-10-2026/how-india-s-bullet-train-project-took-a-long-detour-pg17-09a2cb68-68fc-4777-b3f9-224c474221c9
- https://www.businesstoday.in/india/story/rs1-08-lakh-crore-to-rs2-lakh-crore-why-indias-bullet-train-costs-have-surged-563453-2026-10-25
- https://nhsrcl.in/ja/project/project-overview