This signifies Nichiren's conviction that his life had manifested the essence of the Lotus Sutra. On the top row can be found the names of Gautama Buddha and Prabhutaratna and the four leaders of the Bodhisattvas of the Earth. The names of deities believed to protect the Buddha land, called the Four Heavenly Kings (Bishamonten, Jikokuten, Kōmokuten, and Zōjōten), further occupy the four corners, and Sanskrit characters depicting Aizen Myō-ō and Fudō Myō-ō are situated along the left and right outer edges. Within this frame are the names of various Buddhas, bodhisattvas, historical and mythological figures in Buddhism, personages representing the ten realms, and deities drawn from Vedic, Chinese, and Japanese traditions are arranged hierarchically. Each of these names represents some aspect of the Buddha's enlightenment or an important Buddhist concept. The Nichikan-inscribed Gohonzon consists of 34 blocks of calligraphy. The original copy was inscribed in 1720 by Nichikan (1665-1726), the twenty-sixth chief abbot of Taiseki-ji. In 1993 the Soka Gakkai began to confer Gohonzon replicas based on this mandala. Many of its members opted to replace their old Gohonzon with this transcription. The bolded calligraphy of the central core of the Gohonzon has been compared to the stupa in the Ceremony in the Air. It is divided into three sections:  (1) Namu Myōhō Renge Kyō,  (2) the name of Nichiren, and  (3) his seal (Zai gohan). The core is framed on four sides. On the top row are the two Buddhas who are seated within the treasure tower that emerges in the 11th "The Emergence of the Treasure Tower" chapter of the Lotus Sutra: (4) Gautam Buddha and (5) Prabhutaratna or "Many Treasures" Buddha. Flanking them are the four leaders of the Bodhisattvas of the Earth to whom Gautama, in the 22nd "Entrustment" chapter, entrusts the protection and propagation of the Lotus Sutra in the Latter Day of the Law. They are: (6) Jogyo Bosatsu, Bodhisattva Superior Practices (Skt. Visistacaritra); (7) Muhengyo Bosatsu, Bodhisattva Boundless Practices (Skt. Anantacharitra); (8) Anryugyo Bosatsu, Bodhisattva Firmly Established Practices (Skt. Supratisthitacaritra) and (9) Jyogyo Bosatsu, Bodhisattva Pure Practices (Skt. Visuddhacaritra).