Nichiren sect of Buddhism; Hokke school of Nichiren
Refers to the Nichiren school, sometimes specifically the Hokke sub-school. A proper noun used in religious contexts.
The Hokke sect is based on the teachings of Nichiren.
Tendai sect of Buddhism
Also used historically or in certain contexts to refer to the Tendai school. Less common than the Nichiren-related meaning.
In some texts, 法華宗 can refer to the Tendai sect.