[Anaedilla]

Not to sound high and mighty, but if you are using tabi, how will your feet be allowed to toughen up to the point where you won't get blisters?

Often blisters are a sign of bad footwork. Your feet are twisting when you are moving or attacking, instead of moving straight forwards.

I do understand that some people have other health reasons for wearing them though. And I understand that some dojo/gym floors are not really built with kendo in mind so sometimes that leads to injuries and such. But be careful not to overuse tabi if you don't really need it. Good footwork and a couple practices of not using tabi will toughen your feet up to the point to where it won't be necessary.

Just be honest with yourself as to whether it is really necessary because if you are getting foot injuries from bad footwork, then that is a clear, although painful way of seeing that it needs to be corrected. If you wear tabi all the time, you may be preventing yourself from realizing that corrections need to be made.