Based largely on the ideals and aesthetics of Zen Buddhism and the concept of wabi-sabi (beauty in simplicity), Higashiyama Bunka centered on the development of chadō (Japanese tea ceremony), ikebana (flower arranging), Noh drama, and sumi-e ink painting.
After Blackhill Enterprises disintegrated in the early 1980s, Jenner and his wife Sumi set up Sincere Management which managed a range of artists including Billy Bragg, Eddi Reader, Sarah Jane Morris, Robyn Hitchcock, The Unbending Trees, and Outside Royalty.
Sumi Nagas mostly inhabit the central and southern regions of Nagaland; Zunheboto is the district of the Sumis and they also live in districts such as Dimapur, Kohima, Kiphire, Mokokchung, Tuensang, etc.