Supreme command lies with the Emperor but in practice the Admiralty Board of the Kaigun Kyo oversees the Fleet and commissions ships.
The Admiralty commands:
The Admiralty Board consists of the Thai-so – Admirals - dominated by the Nisei (the primary language of the Admiralty is Japanese).
To be selected as a Thai-so a Chu-sho – a Vice Admiral – must have been in command of a Battle Group for two years and have been in actual war.
The Admiralty Board also oversees promotions, and is heavily influenced by the Great Clans. It sets up Tribunals to judge senior officers when Fleet warships are lost in service.