Topics range from the politics of the late 18th and early 19th centuries through the mores and customs of daimyo, samurai, and commoners of the time.
Seizan was acquainted with Matsudaira Sadanobu, chief councilor to the Tokugawa shogunate from 1787 to 1793, who initiated the Kansei Reforms.
He was also interested in the Western learning that entered Japan via trading contacts with Dutch merchants (a globe that he owned is still preserved in the Matsura Historical Museum), and a collector of popular novels and paintings by masters of ukiyo-e art.
[3] Seizan's writings on the sword show a pronounced Neo-Confucian influence, yet they are not purely academic; they also reflect his profound practical experience in swordsmanship.
While his texts demonstrate the disciplined and scholarly aspects of his personality, various anecdotes, found both in his writings and elsewhere, illuminate other dimensions of his character.
Seizan's daughter Matsura Aiko (1818–1906) married Nakayama Tadayasu, a courtier and later peer at the imperial court.