* Image is for illustrative purposes only.Kumamoto Castle
熊本城
Kumamoto Castle is a historic castle in Kyūshū dating from the Constructed in 1601 (Keicho 6), whose lord was Kato Kiyomasa.
Overview
About the Castle
Kumamoto Castle is one of Japan's Three Famous Castles, built with utmost dedication by Kato Kiyomasa, renowned as the 'Genius of Castle Construction,' and its formidable strength remains a legend more than 400 years after its completion. Constructed over seven years beginning in 1601 (Keicho 6), this castle represents the culmination of Kiyomasa's practical battlefield experience and castle-building theory. Kiyomasa, counted among the Seven Spears of Shizugatake as a trusted retainer of Toyotomi Hideyoshi, was a valiant warrior who led from the front during the Bunroku-Keicho campaigns (Korean invasions), and his combat experience formed the foundation of Kumamoto Castle's defensive philosophy.
Architecture and Structure
The stonework known as mushagareshi (warrior-blocking stone) features a distinctive curve with a gentle slope at the base that becomes increasingly steep toward the top, creating a structure impossible for humans to climb. This stonework is also called the 'fan gradient' and embodies both overwhelming beauty and military rationality. Within the castle grounds, over 120 wells were dug, and Kiyomasa's meticulous preparations for prolonged siege—such as using taro stalks for tatami cores and embedding dried calabash in walls—are evident throughout. This thoroughness proved decisive during the Satsuma Rebellion of 1877 (Meiji 10).
The Castle Today
The formidable Satsuma forces, numbering approximately 14,000 under Saigo Takamori, besieged Kumamoto Castle, but approximately 3,400 defenders under Tani Tateki held the castle for over 50 days. Even in the age of modern firearms, Kumamoto Castle remained impregnable, and Saigo reportedly lamented, 'I was not defeated by the imperial forces, but by Lord Kiyomasa.' The 2016 Kumamoto earthquake inflicted severe damage, with roof tiles falling from the main tower and extensive stonework collapse. However, the main tower's restoration was completed in 2021 (Reiwa 3), and comprehensive restoration work involving the stonework continues on a 35-year timeline.
History of Castle Construction
The restoration process itself has become a precious opportunity to reinvestigate Kiyomasa's castle-building techniques. Kumamoto Castle remains deeply cherished by Kumamoto's people as 'Lord Kiyomasa's Castle,' and citizens' enthusiasm for recovery reflects the profound bond between castle and community. Complete restoration of Kumamoto Castle targets fiscal year 2052 (Reiwa 34), and the process has yielded valuable academic discoveries, such as revealing for the first time the internal structure of stonework from Kiyomasa's era. Witnessing the restoration itself is an experience of participating in history.
The Castle and Its Lords
Kumamoto, known as the 'Land of Fire,' possesses a powerful landscape combining the majestic nature of Mount Aso with Kiyomasa's castle.
Connection to Swords
The Daidotsuga, a group of swordsmiths active in Kumamoto, gained renown as perhaps the most "practical" school of sword craftsmen in Japanese sword history. Their blades were forged with utility as the paramount priority—"unbreakable, unbendable, cuts well"—over ornamental embellishment or refined blade patterns. Warring states daimyo highly valued this reliability and selected Daidotsuga swords when heading into battle. In recent years, the Daidotsuga name has become widely known through films and games and other creative works, serving as a gateway for new generations with an interest in Japanese swords. Kato Kiyomasa himself was a formidable warrior whose name resounded through his martial prowess; legendary anecdotes remain of him slaying a tiger in the mountains of the Korean peninsula during the Bunroku campaign (Korean invasion). The long halberd he wielded is famous, but he also possessed deep knowledge of swords and weapons, and as a practical warrior, he selected his arms with a rigorous eye. Another indispensable element in discussing Kumamoto's sword culture is "Higo-goshirae" (Higo-style fittings). Higo-goshirae is a style of sword fittings that showcases the superior craft of Higo metalworkers, characterized by austere, refined design that eschews excessive ornamentation. The Higo metalworking tradition, which began with Hayashi Matashichi, produced celebrated masters including Shimizu Jinzaemon, Hirata Hikozaemon, and Nishigaki Kanshiro, systematized as the "Four Higo Schools" (Hayashi, Hirata, Nishigaki, Shimizu). Their tsuba feature exquisite chasing work on iron and remain, as works embodying warrior aesthetics, among the most highly esteemed sword-fitting masterpieces among connoisseurs to this day. The Kumamoto Prefectural Art Museum displays Higo swords and sword fittings, where you can appreciate both the practical beauty of Daidotsuga and the austere refinement of Higo metalwork at the same time. The martial aesthetics of Higo, which resonate with TOUKENZA's aesthetic sensibility, are well worth experiencing. Higo metalworked tsuba are characterized by restrained design and refined elegance that brings out the texture of the iron itself; this aesthetic is also expressed as "beauty through subtraction." The practical beauty of Daidotsuga and the austere elegance of Higo metalwork represent two faces of the warrior aesthetic nurtured by Kumamoto, and together exemplify the profound depth of Japanese sword culture.
Highlights
- Mushagareshi stonework — The 'fan gradient' creates the ultimate fusion of beauty and defense, symbolizing Kiyomasa's castle-building philosophy
- Restored main tower — Completed in 2021 with newly renovated interior exhibits; a symbol of Kumamoto
- Uto Tower (Important Cultural Property) — A surviving structure from Kiyomasa's era that endured the Kumamoto earthquake
- Kato Shrine — Dedicated to Lord Kiyomasa, offering an ideal vantage point with the main tower looming overhead
- Kumamoto Prefectural Art Museum — Daidotsuga swords and Higo metalworked tsuba and fittings; experience the warrior aesthetic of Higo
- Restoration work site viewing — Ongoing stonework restoration provides a valuable opportunity to reinvestigate Kiyomasa's castle-building techniques
* Opening hours and admission fees are subject to change. Please check the official website before visiting.