Got the Kaneko Sword (P) awhile ago and tested to some generals (mostly on the Halloween dungeon stages). It seems that the extra target ability of the said weapon does not work on generals that procs on additional targets (tested on Houzhouin Inshun and its still 2 targets when the cross shaped spear skill had been triggered, so it might be the same to SSR Andou and UR Kuroda). It does not work on generals or troop types that involve column attacks (both triggered and passive). But it works on black riders and marksmen (though have not checked on SSR Mori).

It works great on my kenshin bikini babe. Compared Kuniosa sword to the playful kaneko and the result was too good to be true. On the 2nd to the last stage of the Halloween dungeon, using kuniosa sword gave 10k damage to one target but when using playful kaneko, its 8k on the first target and 7k on the second. And take note its a level 40 kuniosa versus a level 0 playful kaneko.

This playful kaneko sword is one dangerous weapon most especially when its equipped by kenshin. Hope I would be able to see offensive type Uesugi Kenshins or Dragons of Echigo in next week's tournament.