User blog comment:TVthePunisher/Isshin and Masaki - Just a Theory/@comment-44061-20100529044419

Oh excuse me I meant to say Urahara was involved in him hiding insinuating that Urahara designed gigai for him, as he was concerned with Isshin's spiritual power level and thought if something was wrong it would have been his fault. Isshin dismisses this and they dont explain further than that.