Board Thread:Questions and Answers/@comment-6207546-20130504124857

I just did a little research and reaized Kaien definitely died before isshin disappeared. Gin had just graduated from the academy when Kaien was a lieutenant but he (Gin) was already a captain by the time he went to observe isshin's fight with the hollow, showing how much time had passed between kaien's death and the current chapter. Which would also mean that since RUkia knew Kaien, she should also be able to recognize Isshin, regardless of the facial hair he now has.. my question is WHY DIDN'T RUKIA RECOGNIZE ISSHIN WHEN SHE SAW HIM??  