Complex sentence: Despite this, he was not arrested for lèse majesté, even when donning the Imperial Crest, because he had a koseki detailing his bloodline back to Go-Daigo in Yoshino, but has been unsuccessful at creating any political change other than sympathy.
Split into simpler sentences: Despite this, he was not arrested for lèse majesté, even when donning the Imperial Crest. He could and did produce a koseki detailing his bloodline back to Go-Daigo in Yoshino, but his claims and rhetoric failed to inspire anything other than sympathy.