I have had great success with crate training except and this is a big one -my shiba Byakko-she is so unpredictable and I think there are other factors here,maybe some people can give suggestions that will help us too.I use crate training but byakko goes in her crate sometimes she goes a week trained and then has accident after accident immediately after coming in frequently both wet and mess.She eats her stools if she gets to it first in her crate because of course on leash I won't let her.My vet thinks it is because before we got her her life was in a box never to know outdoors until she was about 4 months old.She had to eat it to keep the area clean.I think all this plays a roll because right now we have 3 other puppies using the same training methods,one our leonberger with a diarrhea problem being treated but she may need a specialist anyway none of the others have accidents in the house.Byakko is the only one.I do reccommend crate training though in most situations I find it works but be careful not to get to big of a crate.I may even go to a smaller one but I am not convinced that will help her specific problem.I am as frustrated as you are with this one.I definately know how you are feeling.I hope we both get some ideas here.Byakko is definately my challenge puppy obedience wise of course shiba's are a handfull.Dakota is my health issue puppy. Good luck to us both.
Laurie