th ▁K ō k ū ▁Sent ai ▁( 5 th ▁Car rier ▁Division ) ▁was ▁created ▁on ▁ 1 ▁September ▁ 1 9 4 1 ▁and ▁was ▁added ▁to ▁First ▁Air ▁Fle et ▁. ▁When ▁the ▁new ▁aircraft ▁car rier ▁ ▁was ▁added ▁to ▁Fif th ▁K ō k ū ▁Sent ai , ▁First ▁Air ▁Fle et ▁consisted ▁of ▁Ak agi , ▁K aga , ▁S ō ry ū , ▁H iry ū , ▁Ry ū j ō , ▁Kas uga ▁Mar u ▁( ren amed ▁Tai y ō ▁ca . ▁ 3 1 ▁August ▁ 1 9 4 2 ), ▁Sh ō k aku ▁and ▁Zu ik aku ▁, ▁along ▁with ▁their ▁aircraft ▁units ▁and ▁a ▁number ▁of ▁destroy ers . ▁On ▁ 2 5 ▁September ▁ 1 9 4 1 , ▁Kas uga ▁Mar u ▁was ▁transferred ▁from ▁Fif th ▁K ō k ū ▁Sent ai ▁to ▁Four th ▁K ō k ū ▁Sent ai . ▁( K as uga ▁Mar u ▁was ▁used ▁to ▁fer ry ▁aircraft ▁to ▁distant ▁Japanese ▁bases ▁and ▁should ▁not ▁be ▁considered ▁a ▁front - line ▁aircraft ▁car rier . ▁The ▁status ▁of ▁any ▁aircraft ▁unit ▁that ▁she ▁may ▁have ▁had ▁is ▁unclear .) ▁Light ▁car rier ▁Sh ō h ō ▁was ▁added ▁to ▁Four th ▁K ō k ū ▁Sent ai ▁on ▁ 2 2 ▁December ▁ 1 9 4 1 . ▁She ▁was ▁destroyed ▁on ▁ 7 ▁May ▁ 1 9 4 2 ▁in ▁the ▁Battle ▁of ▁the ▁Cor al ▁Sea . ▁Ak agi