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I am inclined to agree with majestic! And it's definitely all in military mounts. looking at the tang and file marks it's definitely not an old blade ie koto or even shintoThe first one is 正真子福本兼房作 Masazaneshi Fukumoto Kanefusa-saku. I wouldn't immediately consider this a fake because it also looks like it has the Showa stamp on that tang, indicating a WW2 arsenal blade. The choppy inscription is typical of WW2 Seki blades.
Looking for some more examples of the first one - I've uncovered some more info and I'm changing my mind. Your sword is more likely 正真子福本兼宗 Masazaneshi Fukumoto Kanemune.
Fukumoto Kanemune appears in the list of military arsenal swordsmiths. See the link below for more info.
FUKUMOTO KANEMUNE WORK - Military Swords of Japan - Nihonto Message Board Also for everyone out there. Never! clean the tang of a sword no matter how much you want to read the Signature ! That is a Massive No! No!