[3] Together with his co-teacher Kanja Odland Roshi, he leads Zenbuddhistiska Samfundet,[4] one of the major traditions of Zen Buddhism in Sweden with centers in several European countries.

[5] He commenced his Zen training in the early eighties as a student of Philip Kapleau.

ZBS also has centers in Stockholm, Gothenburg, Lund, Tampere (Finland), Cologne (Germany) and Glasgow (Scotland).

[10] Poromaa offers regular sesshin (meditation retreats) at Zengården, in English.

His investigations of the possibility of finding common ground between the Buddhist and scientific worldviews led to the publication in 2009 of his book “The Net of Indra – Rebirth in Science and Buddhism”.