Tenno Yushuhito Yamato

Tenno ("Emperor") of a small cluster of systems within the Sollan Empire. Seated on the throne on Nichibotsu. A prince of House Yamato. Wears simple black attire. In attendance at the Great Council of the Alliance in ISD 17438, escorted by five hundred elite warriors and the Imperial navy. A rare presence abroad. Known by the Sollan ruling class as the leader of the "other Empire."

“The Nipponese Emperor is coming here?” The lord of House Yamato never left his home on Nichibotsu.

“Along with five hundred of his finest and the other Imperial navy,” Aurelian laughed. The Nipponese had been allowed to retain the title of Emperor at home, though he was considered a prince in the broader Imperium, equivalent to the great houses of Bourbon, Mahidol, Hapsburg, and the rest. Still, the Sollan Emperors and the lords of the Aventine House liked to call them the other Empire, though the princes of the Yamato ruled but a handful of systems.

Disquiet Gods, Chapter 31: Aurelian