The Hakkenden
2001
, also known as The Legend of the Dog Warriors: The Hakkenden, is an OVA series by AIC in two sequences, the second subtitled . The anime is based on the epic novel Nansō Satomi Hakkenden written by Kyokutei Bakin during the latter half of the Edo period. At 106 volumes, the novel bears the distinction of being the longest novel in classic Japanese literature. imdb.com