Mark, the sword has a mei of Kenryushi Sadaharu. You can see the entry below from Markus Sesko:
SADAHARU (貞晴), Keiō (慶応, 1865-1868), Settsu – “Naniwa-jū Mizuguchi Kenryūshi Sadaharu saku” (浪華住 水口剣龍子貞晴作), “Settsu Ikutama ni oite Kenryūshi Sadaharu kore o tsukuru” (於摂津生玉剣龍子 貞晴造之), “Naniwa-jū Kenryūshi Sadaharu saku” (浪花住剣龍子貞晴作), student of Gassan Sadayoshi (月山貞吉), his gō were Kenryūshi (剣龍子) and Kensaishi (剣斎子), we know blades from the Keiō to the Meiji era (明治, 1868-1912), mostly a magnificent sugata with a wide mihaba and an ō-kissaki, dense ko-itame or masame which tends to muji, suguha-hotsure, notare, gunome, he works in the style of his master Sadayoshi, he also added a koku´in seal in the form of the character “chū” (忠・忠) , chū-saku