its same hadda (sp) which translates to rough skin. the sword is supposed to resemble sharks skin only magnified hundreds of times. the sword really hundreds of hook like blades reversed made to rip and tear fleash apart. like sand paper. but to a much larger skill.

it also has other abilitys that you will see later.

also anyone notice that kisam and itachis rings where different like color and kanji on there ring and oro's too does any one know what the kanji was.

spoiler the other ability















it can absorb chakra.