"Berabou" - How skilled is Toshinori Omi as Toseidou Kisanji, the samurai writer who teams up with Tsutae?

In the historical drama "Berabou", Omi Toshinori plays the role of Houseido Kisanji. His pen name is "Houseido Kisanji" and his real name is Hirasawa Tsunetomi, a samurai of the Kubota clan (Akita clan). Who is he? This has been a hot topic among viewers. Although his appearance was announced in the opening credits, he hardly had any scenes and it was unclear where he was. His true identity was finally revealed in the 12th episode, and it was de…