As part of a historic agreement, India acknowledges Tibet as a part of China - although it rejects Beijing's claim to about 90,000 square kilometers (35,000 square miles) of Indian-controlled territory in Arunachal Pradesh.
The tour became a source of peace for the Himalayan region.
The visit is the Dalai Lama's seventh to Arunachal Pradesh and his first since 2009. It claimed that people living in Arunachal Pradesh "live hard lives, face various kinds of discrimination and look forward to returning to China".
Speaker of Tibetan Parliament in Exile Khenpo Sonam Tenphel and Tibetan political leader Sikyong Dr Lobsang Sangay extended a warm reception to the spiritual leader at Gagal airport.
Pema Khandu, chief minister of Arunachal Pradesh, told Reuters on April 5 that he regarded the land on the other side of the border as Tibet, not China.
Mr Khandu requested him to confer the Kalachakra Teaching in Arunachal Pradesh in the near future.
He said the boundary and Tibet-related questions "bear the political foundation of China-India relationship" and the two countries have reached "important consensus" of resolving the dispute through talks and consultations. China is opposed to the Dalai Lama's visit to Arunachal Pradesh, particularly Tawang, which it considers as Southern Tibet. China has lodged a diplomatic protest to India over the visit and a number of articles and editorials in the Chinese state media have attacked the spiritual leader over the visit.
"China has already made stern representations to India, and will take further measures to protect China's territorial sovereignty and national security", he added, without elaborating.
Chinese troops marched into Tibet and took control in 1950 in what Beijing calls a "peaceful liberation".
Building on the argument in the leading daily, Lu claimed Tibet is achieving faster growth.