I would use it. Though there are better weapons (Stats wise) out there for nin, This one has low delay. Not to mention the +5 Evasion to boot. All around, a nice weapon.
i would def use it if i can find out how to get my hands on one.
theres only 2(excluding +1 versions of the Kunai +1,Hibari +1 Hien +1,Hayabusa +1) other Katana's that has this delay (Hototogisu and Kitsutsuk). they are all good katana's in their own respects,but for a LVL 72 katana with 185 delay 28 DMG alone for me is "WOW" ... not including the Other Stats that are awesome ... i would def, offhand this /w perdue when i can get my hands on both .. i currently use Hayabusa x2 as NIN .. i know people probably say .. (well your crazy for doing that) But i guess it depends on what u like on NIN ... Me personally i love Low delay weapons ..
Low delay doesn't mean anything when the damage is low, too. DPS is a ratio of those two factors. Fudo are the best DPS katanas AND have the highest base damage. Using Perdu in front hand would just hinder your WS.