The Man At Arms is Back!

[Sephiroth]

7 foot is about 2.1 meters

Right and that is longer than Masamune is, especially as it says "over 7ft". Sephiroth is 1,85m and his blade is about 1,75-1,80m while the rest fills up to about 2m. His official action figure is very accurate about the body to sword ratio. Masamune and his hair are longer in Kingdom Hearts though.

I'm not sure why anyone would expect perfect accuracy when making a replica of an non-existent and completely absurd weapon for fun. That it was bigger only makes it more awesome, not less.

Because it is no replica then and normally people care about accuracy when making something like this for real. Also Masamune is real, just not this Odachi.