"EAM @SushmaSwaraj ji told me that the visit has generated lot of positivity & optimism in India about our ties with Japan. Glad to know," Modi tweeted later.
Sources said Swaraj decided to go to the airport to meet Modi especially to convey her happiness over the "success" of the visit.
She was seen telling something to Modi as he came down from the special plane and the two shared a laugh.
During his visit, Modi struck the chord with Japanese leadership and business community while inviting them to invest in India.
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"This visit has been very successful," Modi had said at the Indian community reception hosted in his honour earlier.
Japan promised to give USD 35 billion to India over the next five years for developmental projects.
The two countries also decided to enhance cooperation in defence and other strategic areas and also signed five pacts covering defence exchanges, cooperation in clean energy, roads and highways, healthcare and women while vowing to take their relationship to newer level.