White's rook can be moved flexibly to counteract Black's attacks.
These types of White openings are named simply Ranging Rook (振り飛車 furibisha).
In these games, Black has the initiative, and White quickly builds a defense by castling the king and seeks counterattacking opportunities.
By default, the term 振り飛車 usually assumes that the Ranging Rook player is White as it was played traditionally.
Since the traditional Ranging Rook prevents early bishop exchanges, it is described as a slow game (持久戦 jikyūsen) in Japanese.
Preventing an early bishop exchange allows for the Ranging Rook player to develop the castle and defense without needing to worry about being stymied by bishop drops.
The traditional normal type of Ranging Rook contrasts with Ranging Rook positions that allow a bishop trade off to occur at any time (often early in the opening), which are known as Bishop Exchange Ranging Rook (角交換振り飛車 kaku kōkan furibisha) or Open Bishop Diagonal Ranging Rook (角道オープン振り飛車 kaku michi ōpen furibisha).
Bishop Exchange Fourth File Rook (角交換四間飛車 kaku koukan shikenbisha) is an aggressive variant of Fourth File Rook in which the Ranging Rook player keeps the bishop's diagonal open allowing for bishop trades early in the game.
The Fujii System (藤井システム fujii shisutemu) is a complex system of piece development, castle formation, and counterattacking to be used with Ranging Rook strategies.
It was invented by shogi professional Takeshi Fujii (藤井猛).
The Ishida (石田流 ishida-ryū) openings – including Real Ishida (石田流本組 ishida-ryū hon gumi) and Quick Ishida (早石田 haya ishida) variations – are subcategories of Third File Rook in which the seventh file pawn (if played by Black) or the third file pawn (if played by White) is advanced to the 5th rank early in the opening, allowing the rook to move up to 76 (or 34 for White).