Thanks— yeah, I just assumed it was going to come back Bungo Takada.
I’m not finding “Dōsao Morihiro”anywhere, and aoi seems to be stating that’s the actual attribution.
Markus Sesko’s Swordsmiths of Japan has a few more details about the Tensho-era Hoki Morihiro,
“…real name Shichirō’emon, he also signed with the honorary titles Uemon no Jō and Saemon no Jō, a theory says that this was the early signature of Shichirōzaemon Hiroyoshi, chūjō-saku.”
This is the only pairing I can find of “Morihiro” and “Hiroyoshi.”