Japan has pitched for a complete transfer of design and production rights of its cutting-edge Mogami-class stealth frigate to India in a bid to sell the technology to its most consequential strategic partner in Asia.
The move which Indians and Japanese officials have been talking about for sometimes now, comes afresh in the backdrop of Japanese Prime Minister Sanae Takachi holding successful defence and tech cooperation talks with her counterpart Prime Minister Narendra Modi on Thursday.
However, the problem for Indian defence planners is that the proposal arrives at an awkward moment for India’s naval modernisation.
The Indian Navy has already invested heavily in indigenous warship design through Project 17A, under which several Nilgiri-class stealth frigates are under construction.
However, from a diplomatic and strategic point of view the Japanese proposal reflects Tokyo’s willingness to export one of its frontline naval platforms and positions to India as a long-term strategic manufacturing partner.
If accepted, Indian shipyards such as Kolkata-based Garden Reach Shipbuilders & Engineers or Mumbai’s Mazagon Dock Shipbuilders Limited (MDL) could manufacture the Japanese-designed frigates domestically, with reports suggesting that the agreement would include extensive technology transfer, design ownership, and integration of Indian weapon systems such as the BrahMos supersonic cruise missile.
“Japan’s proposal is significant because it represents a dramatic evolution in Tokyo’s defence export policy. For decades after the Second World War, Japan maintained near-total restrictions on exporting military equipment,” pointed out Rajaram Panda, former Senior fellow of the Institute of Defence Studies.
Strategically, the proposal aligns with the growing convergence between New Delhi and Tokyo over maintaining a stable Indo-Pacific region amid China’s rapidly expanding naval footprint. Both countries increasingly view maritime cooperation as central to regional security, and co-producing sophisticated naval frigates would deepen defence-industrial integration beyond exercises and diplomatic coordination.
However, defence officials point out that while both are modern stealth frigates, the Mogami and Nilgiri classes were conceived for different operational doctrines.
The Indian Nilgiri-class stealth frigate, developed under Project 17A, such as INS Taragiri, commissioned two months back, is effectively a heavily armed multi-role combatant, described by naval analysts as a “pocket destroyer.”
Displacing around 6,670 tonnes, it carries a huge suit of attack weapons, including 32 Barak-8 vertical launch air defence missiles and eight BrahMos supersonic cruise missiles.
“Combined with its advanced MF-STAR radar and comprehensive anti-submarine warfare suite, the indigenous stealth ship is designed for sustained high-intensity fleet operations,” defence sources said.
The Japanese Mogami-class is lighter at approximately 5,500 tonnes and more automated, requiring a crew of only about 90 personnel compared with roughly 226 aboard the Nilgiri class stealth ‘pocket destroyer’.
“However we do not have a trained manpower problem in our navy unlike Japan or other western countries and automation alone is not a plus for us, though we should be open to it,” officials said, adding “where the Japanese score against us is that their Mogami class frigates have an even more reduced radar signature compared to our vessel, but that can fixed in future versions.”
India has prioritised heavily armed, multi-layered combatants capable of operating independently in contested waters, while “Japan has focused on highly automated, flexible platforms that maxes efficiency while reducing manpower requirements”.
The main problem, officials say is that the proposal also raises difficult questions about India’s indigenous naval ambitions.
“Project 17A represents decades of accumulated experience in designing increasingly sophisticated warships domestically,” officials pointed out. India’s naval design establishment has steadily evolved from licence production of foreign platforms to producing highly capable indigenous combat vessels integrating Indian and international technologies.
Introducing an entirely new foreign frigate class would inevitably create another logistics chain, maintenance ecosystem, crew training pipeline and supply network. Even if construction is localised within India, “lifecycle dependence on Japanese-origin components and specialised technologies may persist for decades”.
Indian shipyards already face demanding production schedules involving destroyers, frigates, submarines and aircraft carriers. Officials also caution that allocating production capacity toward an imported design could slow future indigenous programmes unless carefully managed.