Arai Hakuseki
In 1694, a "rōnin", Arai Hakuseki, was appointed as personal tutor and advisor to Ienobu. Hakuseki used to be a teacher in Edo, but was recommended by the philosopher Kinoshita Jun'an to become personal tutor to Ienobu and was summoned to Ienobu's Edo residence. Until 1709, when Ienobu became "shōgun", it is thought that Hakuseki gave him 2000 lectures on the Chinese classics and Confucianism. This was helpful to Ienobu since Shogun Tsunayoshi had also been a great patron of the Chinese classics and of Neo-Confucianism. After Ienobu's ascension, Hakuseki devoted the rest of his life to advising Ienobu, even writing a book for him, known as the "Hankanpu" covering the history of various fiefs from 1600 until 1680.