Thank you so much to everyone.
I have added few information to my former translation but I still have problems in translating the last part (row 7 on David's transliteration)
I am now writing:
“Bizen [no] Kuni Osafune Masamitsu. Ō-suriage, mumei, wide Haba, ō-kissaki, dropping shinogi-ji, high shinogi, thin kasane. The shape style is that of Enbun/Teiji periods [1356–1368]. Itame hada showing a pale midare utsuri. Rich hamon with wide yakihaba and good nie, showing ō-notare mixed with gunome. Shows the style of Kanemitsu school ______________. Blade length: slightly more than 2 Shaku 2 sun 9 bu. Spring or Reiwa 1 [2019]. Written by Tanzan [Tanobe] Michihiro [+kao]”