Shogi Castles: Yagura, Mino, and Anaguma Compared

A shogi castle is a defensive formation built by hand over several moves: the king walks to one wing and golds and silvers assemble around it. Shogi has no castling move; players construct castles piece by piece. The three every player learns first are the Yagura, the Mino, and the Anaguma.

Why castles rule this game

Chess players castle in one move and then mostly stop thinking about it. Shogi players spend six to fifteen opening moves on their castle, give the resulting shapes names and genealogies, and study them the way chess players study openings. The difference isn’t culture. It’s the drop rule.

In chess, an attack spends itself: trade off the attackers and the storm passes. In shogi, captured attackers reload into the attacker’s hand, and empty squares near your king are landing zones. Defense can’t rely on trades or on distance; it has to rely on structure, on formations where every square near the king is watched twice, where checks run out before material does. A castle is that structure, and games between equal players are often decided by whose castle demands one more piece to crack.

Hence the first commandment taught to every beginner (and repeated on the openings page): castle before you attack. Here are the three castles that cover ninety percent of what you’ll need.

Yagura: the fortress

The Yagura (“turret”) is the classical castle of Static Rook versus Static Rook games: a thick, three-general wall with the king tucked behind layered gold-silver cover, strongest against attacks arriving from the front, which is precisely where a fellow Static Rook player’s attack arrives.

Its cost is time; the full structure takes considerably longer than a Mino, and building it while your opponent builds theirs is its own choreography, studied for centuries. Its classic vulnerabilities are the edge and lines coming in from above once the front is locked. Build it when the position is symmetric and front-loaded; don’t bother when the enemy rook already points at your side door. Full construction and defense guide on the Yagura page.

Mino: the quick shell

The Mino is the Ranging Rook player’s home: the king slides into the wing the rook vacated, and silver plus golds click into a compact diagonal shell, in about six moves, nearly identical every game. For efficiency, protection gained per move spent, nothing in shogi beats it.

Its strength faces sideways, into the frontal assault of a Static Rook attack. Its known weak points, the edge above the king and the head-on file, need real technique to exploit. The Mino also upgrades in place (taller and wider versions exist) when the game gives you time. If you learn exactly one castle, learn this one; the Mino page has the layout, move order, and the standard defensive techniques.

Anaguma: the bunker

The Anaguma (“badger’s hole,” or “bear in the hole”) is shogi’s maximum-security option: the king crawls into the actual corner square, where the lance started, and generals wall off the exit. The king could not be further from the fighting, and there’s a proverbial payoff: an Anaguma king is out of reach of ordinary checks, so its owner attacks with a freedom other castles never enjoy, trading recklessly where an exposed king would need caution. Sacrifices that would be unsound anywhere else are business as usual next to an Anaguma.

The price: it’s the slowest of the three (the opponent gets free rein while you dig), the king has zero escape routes if the wall does crack, and the whole structure can be squeezed from a distance. Both Static Rook and Ranging Rook versions exist; the Static Rook Anaguma in particular is a dominant weapon in the eternal fight against Ranging Rook. Details on the Anaguma page.

Choosing: a practical matrix

• You’re playing Ranging Rook: Mino, almost always. It’s the family’s other half.
• Static Rook versus Static Rook: Yagura is the classical education; learn its shape even if you later prefer alternatives.
• Static Rook versus Ranging Rook: a quick light castle early, growing into Anaguma when you want the full bunker; the extra safety converts directly into attacking license.
• Not sure and low on time: Mino. Six moves, works everywhere at beginner level, teaches correct habits.

Two closing principles that outrank any specific choice. Finish the castle; a half-built anything is worse than a completed Mino, because known shapes have known defenses and rubble has none. And know your castle’s weak square, every castle has one, because your opponent will eventually study the same pages: for each castle above, the guide covers where the attack comes from and the standard repairs.

Then test the theory: build each castle against the computer on our free board and let it try to break you. Ten such games teach more than any diagram. When you’re ready for the attacking side of the same knowledge, tsume puzzles show you how castles die.

FAQ

What is a castle in shogi?

A shogi castle is a named defensive formation, typically the king moved to one wing and sheltered behind two or three generals, built move by move during the opening. Shogi has no single castling move like chess; every castle is constructed by hand, usually in six to fifteen moves.

What are the main castles in shogi?

The three fundamentals: the Yagura, a thick fortress for Static Rook versus Static Rook games; the Mino, the fast, efficient castle paired with Ranging Rook; and the Anaguma, the slow maximum-security bunker with the king in the corner. Dozens of other named castles are variations or hybrids of these families.

Which shogi castle is strongest?

The Anaguma offers the most raw safety: the corner king sits beyond the reach of ordinary checks, licensing aggressive play. But it costs the most moves and traps the king if breached. Strongest in practice depends on the opening matchup, which is why players learn Yagura, Mino, and Anaguma rather than one castle.

Why is there no castling move in shogi?

Shogi’s rules never adopted a special king-and-rook move; the king simply walks. The deeper reason castles still dominate is the drop rule: captured pieces re-enter play, so attacks never exhaust themselves, and only a solid multi-piece structure, not a one-move king hop, keeps a king safe long-term.