Ebisugawa Kureichirou is the eldest son of Ebisugawa Souun. After his father's death he returned to Kyoto and became the head of the family. Together with Yaichirou he restored the peace between the Ebisugawa and Shimogamo families.
In reality it was Souun disguised as Kureichirou. The real Kureichirou was loitering in the Shikoku province with the Kinchou family until Yajirou met him during his travels.