"The Indian community extends a very warm welcome to the Prime Minister on his arrival in Tokyo," the Prime Minister's Office tweeted.
According to the External Affairs Ministry, in recent years, there has been a change in the composition of the Indian community in Japan with the arrival of a large number of professionals.
"These include IT professionals and engineers working for Indian and Japanese firms as well as professionals in management, finance, education, and S&T (science and technology) research who are engaged with multinational as well as Indian and Japanese organisations," a ministry brief on Japan states.
On Friday, Modi will call on Emperor Akihito and attend the bilateral summit with Japanese Prime Minister Shinzo Abe.
On Saturday, the Prime Minister will travel by the Shinkansen high-speed rail to Kobe.
Japan has committed to build a high-speed rail system between Ahmedabad and Mumbai. This is Modi's second visit to Japan in two years.