Modi, accompanied by his Japanese counterpart Shigeru Ishiba, travelled in a bullet train to Sendai, situated at a distance of over 300 km from Tokyo.
The cost of railway linking Mumbai and Ahmedabad is between $12.2 bn to $13.9 bn.
'Once finished, the project will reduce the travel time between Mumbai and Ahmedabad to just over two hours.'
The annual summit between India and Japan on Saturday will seek to forge greater bilateral trade and investment ties, with Japanese Prime Minister Shinzo Abe coming with a high-powered business delegation.