Board Thread:Game Updates/@comment-3502824-20180328015558/@comment-32047681-20180423180424

SSTHZero wrote: Tsushima Kai + Etorofu Kai works for HP modernization, right? they need to be sister ships, so if your wondering about a combination just go to their respective wiki pages and check their ship class.

and yes Etorofu and Tsushima are both Etorofu class kaibokan