anaguma castle; badger castle
A highly defensive shogi opening where the king is tucked into a corner, often with a solid formation of golds and silvers. Named after the badger's burrow.
The anaguma castle is a solid formation that makes it easy to withstand the opponent's attacks.
In professional shogi, the anaguma castle is often used.
From 穴熊 (anaguma, 'badger') + 囲い (gakoi, 'enclosure, castle'), referring to the badger's burrow-like defensive formation in shogi.