Toyotomi Hideyoshi tried to get several important people to adopt him in order to adopt certain government titles IOTL. He succeeded with the Fujiwara, which ended with him taking the Kampaku and later Taiko title. Before he got adopted by the Fujiwaras however, he also tried to get the last Ashikaga Shogun to adopt him before being told to GFY.WI the last Ashikaga Shogun agreed? He would probably become shogun of course, but would a difference in the government office change anything if he only had a child as his like by the time of his death like OTL? I have heard some people claim that the reason why the Tokugawa could dislodge the Toyotomis so easily was because the title of shogun had more legitimacy as a ruler than kampaku, and was far more hereditary? The title of Kampaku was by all means higher than that of the shogun, and was used by many Fujiwara de facto rulers before the rise of the shogunate, so I am not really convinced of that statement. I have a feeling that the Tokugawas could still seize power had the same OTL events minus the change in title occurred.