Singh will hold exhaustive talks with his Japanese counterpart Shinzo Abe on Wednesday on the entire gamut of bilateral ties with special focus on giving boost to cooperation in defence, economic, energy and other areas.
Singh accompanied by his wife Gursharan Kaur arrived here, his first halt in two nation tour, described Japan as a "key regional and global partner for India".
Official sources in the Indian side dismissed reports of India going slow on ties with Japan so as not to annoy China.
"When Japan is keen to see that whatever it does is in the direction of strengthening non-proliferation regime, India's own view is that civilian nuclear energy cooperation with Japan will only further strengthen non-proliferation regime.
"India is quite happy to proceed at the pace determined by the Japanese side," the sources said while reacting to reports that there are issues in Japan on a bilateral nuclear deal with India.
Singh's visit, originally scheduled for November last year, was postponed following the announcement of general elections in Japan in December.
Singh said in his summit with the new government of Japan led by "good friend" Abe, he will build on the momentum imparted by successive summits to the India-Japan Strategic and Global Partnership.
"My visits to Japan and Thailand will add depth and new meaning to our 'Look East' policy and contribute to peace, prosperity and stability in the Asia-Pacific," he said.
Singh will later travel to Thailand on a two-day visit from May 30.