User blog comment:Apocaylpse06/Ichigo Kurosaki's (New) Zanpakuto/@comment-3010659-20110817104256/@comment-1198999-20110817152953

you got one thing wrong and that is that isshin's Shikai has never been seen and he did the Getsuga Tenshou with his sealed Zanpakuto. you will find this out when you look at Isshin's page