Soshu Tonegawa (Tone River, Shimosa Province), from the series Chie no umi (Oceans of Wisdom)

This series is one of Hokusai's rarest sets. It seems to have been issued in the mid-1830s and like the Hyakunin isshu uba ga etoki (The Hundred Poems as told by the nurse) series of the same date, publication of the prints ceased abruptly. Ten prints comprise the complete set, although a number of preparatory drawings are extant for prints that were never made.