User blog comment:Nick D Wolfwood/Questions questions questions!! Kurosakigate.../@comment-1961713-20100625045632

@Salubri, likewise in such words you are implying that others can learn Getsuga Tensou provided they are related to Isshin and Ichigo right, or a Shinigami who has GETSU named in some parts in the Zanpakuto's name can learn Getsuga Tensou same as like Hisagi's Kazeshini and Kensei's Tachikaze (IDK their attack name) right?

I did not recalls Aizen ever said anything about Isshin's Getsuga or anything about Urahara's seal? But I recalls Urahara's unrelease and release form as same like The Captain Commanders Zanpakuto's Form.