The inaugural meeting of the group, whose name apes the Nobel Prize-winning Doctors Without Borders, was held in Japan's ancient capital of Kyoto yesterday, said Hiroaki Nakajima, chief priest at Joko-ji temple in the city.
"Normally, Buddhists do not have regular interactions with people from different schools (of the religion), but I think we can cooperate under the name of Buddhism, which cherishes salvation of individual souls and lives," he said.
Nakajima, who says the grouping has sparked interest overseas, believes it will help with the self-promotion he thinks many Buddhists struggle with.
"We hope to strengthen our public relations by setting up a Facebook account," he said.
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To avoid potential conflicts with governments or Buddhist school officials, the grouping will take the form of a loose "cloud", where individual monks support others' activities in poverty reduction, the fight against discrimination and disaster-relief, he said.
Buddhism is practised across vast swathes of South and East Asia including in China's restive Tibetan autonomous region.
Doctors Without Borders, also known by its French name Medecins Sans Frontieres, is a humanitarian non-governmental organisation that focuses on providing medical help to people in war zones or areas hit by disaster.