ida ▁( 1 ▁December ▁ 1 9 1 1   – ▁ 1 ▁December ▁ 1 9 1 2 ) ▁R ear - Ad mir al ▁Se inos u ke ▁T ō g ō ▁ ▁( 1 ▁December ▁ 1 9 1 2   – ▁ 1 ▁April ▁ 1 9 1 3 ) ▁Vice - Ad mir al ▁Tom oj ir ō ▁Ch is aka ▁( 1 ▁April ▁ 1 9 1 3   – ▁ 1 ▁December ▁ 1 9 1 3 ) ▁Vice - Ad mir al ▁Y as uj ir ō ▁Nag ata ▁ ▁( 1 ▁December ▁ 1 9 1 3   – ▁ 1 ▁December ▁ 1 9 1 4 ) ▁R ear - Ad mir al ▁E itar ō ▁K ata oka ▁ ▁( 1 ▁December ▁ 1 9 1 4   – ▁ 1 ▁April ▁ 1 9 1 5 ) ▁R ear - Ad mir al ▁Tok ut ar ō ▁Hi rag a ▁( 1 ▁April ▁ 1 9 1 5   – ▁ 1 ▁April ▁ 1 9 1 6 ) ▁R ear - Ad mir al ▁Y ush ichi ▁K anno ▁ ▁( 1 ▁April ▁ 1 9 1 6   – ▁ 1 ▁December ▁ 1 9 1 7 ) ▁R ear - Ad mir al ▁Mas aki ▁Nak am ura ▁( 1 ▁December ▁ 1 9 1 7   – ▁ 2 5 ▁September ▁ 1 9 1 8 ) ▁Vice - Ad mir al ▁Ken zo ▁Kob ay ashi