Verified answer

I've heard it's a fictional Japanese sword so I don't think you could get one. Try this link

Sakabuto is a Japanese style sword (katana) with the sharp edge (ha) and the back edge (mune) reversed. If one were to use the sword to strike in the normal fashion you'd hit the target with the blunt edge. To the best of my knowledge this sword only appears in the anime series Rurouni Kenshin. In the series Kenshin is adverse to killing and uses the blunt edge to stun his enemies only using the sharpened edge as a last resort.

Swords sharpened in this fashion were never made or used historically although some modern wall-hanger sword companies make them.

If you really want one try E-Bay, but please don't try to actually use it or any other sword without training.