To visualize using a sword like this, pick up a F96T12 fluorescent light bulb, only that the hilt sticks out further where the pin at the end would go. Take the fluorescent tube and whack someone across the back with it (people actually do this on Youtube videos!). Congratulations, your friend just got a slight taste of the masamune's sheer power.
2. When you perform a masamune it's when you do the act with the fluoro tube in #1.
3. They make a masamune that you can buy online, but it is much shorter (58 inches +/- 12 inch) because reality technology hasn't caught up with the technology fictional world of Final Fantasy (schizo tech). Even then, today's masamune is very long for a samurai sword. Not too pleasant to use for harakiri rituals (especially in reality where there's no respawn).
2. In 2008 I want to give my friend a masamune and inhale some mercury.
3. Memere bought the masamune from Quickly Vanishing Cash.