I have a WW2 gunto mounted blade with a mei that I’ve translated as Hizen Kuni TadaAki Saku (see picture). I’ve found a reference to a Tadaaki in Slough’s (no oshigata but references to 4th seat in forging and 2nd seat in cutting test at the 1941 Sword Exhibition). I did find a reference on this forum to an Ishii Tadaaki in Hizen who was a gendaito smith during the Showa era. Otherwise, the only reference is to a Yamamoto Tadaaki (1865-68) in both Hawley’s and Markus’ books (nothing in F&