Several denominations comprise the umbrella term "Nichiren Buddhism" which was known at the time as the "Hokkeshū" (Lotus School) or "Nichirenshū" (Nichiren School). The splintering of Nichiren's teachings into different schools began several years after Nichiren's passing. Despite their differences, however, the Nichiren groups shared commonalities: asserting the primacy of the Lotus Sutra, tracing Nichiren as their founder, centering religious practice on chanting "Namu-myoho-renge-kyo", using the "Gohonzon" in meditative practice, insisting on the need for propagation, and participating in remonstrations with the authorities. The movement was supported financially by local warlords or stewards ("jitõ") who often founded tightly-organized clan temples ("ujidera") that were frequently led by sons who became priests. Most Nichiren schools point to the founding date of their respective head or main temple (for example, Nichiren Shū the year 1281, Nichiren Shōshū the year 1288, and Kempon Hokke Shu the year 1384) although they did not legally incorporate as religious bodies until the late 19th and early 20th century. A last wave of temple mergers took place in the 1950s. The roots of this splintering can be traced to the organization of the Nichiren community during his life. In 1282, one year before his death, Nichiren named "six senior priests" ("rokurōsō") disciple to lead his community: Nikkō Shonin (日興), Nisshō (日昭), Nichirō (日朗), Nikō (日向), Nitchō (日頂), and Nichiji (日持). Each had led communities of followers in different parts of the Kanto region of Japan and these groups, after Nichiren's death, ultimately morphed into lineages of schools. Nikkō Shonin, Nichirō, and Nisshō were the core of the Minobu (also known as the Nikō or Kuon-ji) "monryu" or school. Nikō became the second chief abbot of Minobu (Nichiren is considered by this school to be the first). Nichirō's direct lineage was called the Nichirō or Hikigayatsu "monryu". Nisshō's lineage became the Nisshō or Hama "monryu".