Board Thread:General Discussion/@comment-1429792-20140920205950/@comment-8986886-20140922170857

StealthBlade98 wrote: I have another theory now we know that it's confirmed through sources that he can still sense reiatsu even if he had no powers to do anything about it. Perhaps what he said was a bit to vague. Maybe what he meant to say was he didn't have his Engetsu powers to help but he could still perform Kido based techniques or create kido based chamrs. You have to remember Kukaku Shiba, who Isshin is affiliated with as part of the shiba clan is a noble clan, that she herself, is not considered a shinigami but still can perform kido based techniques. One could say Kido isn't shinigami exclusive. Kido techniques may not be exclusive to Shinigami, however, their effect relies on the practitioner's Reiatsu, and skill ofc. According to Kisuke, Isshin would've been weakened to the point where he was no longer able to see Hollows. That doesn't concern Isshin's Zanpakutou, or him being a Shinigami; e.g. Tatsuki is Human and was able to see Ulquiorra, and Yammy.

Other examples of 'normal' Humans who can see spirits are: Keigo, Mizuiro, and Chizuru, i.e. Isshin had less Reiatsu than they have. He would've had roughly the same amount of Reiatsu as Yuzu has, since she is able to sense spirits, but is unable to see them, just like Isshin was before his powers returned.

What I doubt is, with a Reiatsu that weak, was Isshin able to use Kido at all? Not to mention, create a charm powerful enough to block an Arrancar's attack?