Task: Text Categorization
Input (English): One of sect of this school of thought emphasizes the shikantaza practice, and one important practice in this school of thought is kensho. Its branches include Obaku, while another of its branches was founded by Dogen. Texts important to this religion include the Blue Cliff Record and The Gateless Gate, and its origin can be traced back to the Flower Sermon. Its Soto and Rinzai sects differ on the emphasis over meditation on koans. For 10 points, name this branch of Mahayana Buddhism commonly practiced in Japan.
Output (English): Social Science