Central Rook Fortress

Central Rook Fortress (矢倉中飛車 "yagura nakabisha") is a Double Fortress (Double Static Rook) shogi opening.
This strategy characteristically swings the player's rook to the central file to support an attack there.
Central Rook Fortress should not be confused with Yagura's Central Rook (矢倉流中飛車 "yagura-ryuu nakabisha") which is an unrelated Central Rook strategy named after professional player Norihiro Yagura.