Kanazawa Castle's Thirty-Story Tenement

The Long Storehouse on the Honmaru Terrace

The Sanjūkken Nagaya of Kanazawa Castle (金沢城三十間長屋, Kanazawajō Sanjukken Nagaya), a two-storey multi-bay turret standing on the Honmaru terrace at 71 Marunouchi, Kanazawa City, Ishikawa Prefecture, was rebuilt in the closing years of the Edo period and designated an Important Cultural Property on 18 June 1957.

Japanese castles call this building type a tamon yagura: a long, narrow structure that works as wall and warehouse at once, running along the top of a stone rampart. At Kanazawa the local word was nagaya, the same term used for row housing. The name Sanjūkken means thirty ken, an old length unit of roughly 1.8 metres. The building measures about 26 and a half ken, near 48 metres, so the name overstates it. Names attach to sites, and this one outlived the structure it originally described.

An earlier long storehouse stood here from the early Edo period and burned in the Hōreki fire of 1759, which took the castle almost entirely. The stone base sat empty for close to a century before the present building went up. The Agency for Cultural Affairs records the date as the first year of Man'en, 1860. Ishikawa Prefecture and Kanazawa City both give 1858, the fifth year of Ansei. Visitors will meet both dates on signage and in guidebooks, and the discrepancy has not been resolved in the public record.

Whatever the exact year, the building was raised as a powder magazine. Earlier in its history the site had held tableware. Gunpowder came later, and the change tells you something about how the Maeda house read the 1850s.

Why It Matters at Kanazawa

Kanazawa Castle was the seat of the Maeda, whose Kaga domain was assessed at over a million koku, the largest holding under the Tokugawa after the shogunal house itself. The castle burned repeatedly. A fire in 1881 destroyed most of what remained, and only three Edo-period buildings survived it: the Ishikawamon gate, the Tsurumaru storehouse, and this one.

That is the argument for designation in a sentence. The reconstructed Hishi Yagura, Gojukken Nagaya, Hashizumemon Tsuzuki Yagura and Nezumitamon that now dominate the park are careful modern work in traditional technique, built from documentary evidence. The Sanjūkken Nagaya is not a reconstruction. It is the thing itself, and it is the only surviving nagaya at the castle.

Its designation number is 01408. The structure is recorded as a two-storey, two-tier tamon yagura, hip-and-gable roofed on the south face and gable-roofed on the north, covered in lead tile. Length at that scale is genuinely uncommon among surviving examples.

Lead tile deserves a note. Kanazawa's castle buildings are roofed in it, and the surface weathers to a pale grey-white that looks, from a distance, like snow that has not melted. A durable local legend holds that the lead was stockpiled so it could be melted down into musket balls in a siege. The practical explanation is that lead resists the freeze-and-thaw cycle of Hokuriku winters better than clay tile does. Both stories circulate. The second one is likelier.

The wall treatment repeats the castle's signature combination: white plastered upper walls above a skirt of namako tilework, square tiles set diagonally with raised plaster ridges along the joints, the same pattern found on the Ishikawamon. A lead-tiled pent roof runs below the second-storey wall.

What to Look For, and When to Come

The building is easy to miss. It sits on the raised terrace beside the Honmaru, screened by trees, away from the main circulation of the park, and visitors heading for the reconstructed turrets often walk straight past the path to it. That is part of its character now. The Ishikawamon performs; this one does not.

Approach it from the wrong side and you will see the wrong face. The entrance faces inward, toward where the keep once stood, and that is the back. The front is the long elevation on the rampart side, the one that looked down over the town, and it carries the detail: three projecting windows along that face, the central one rising from a stone base with a hip-and-gable roof, the two flanking ones roofed with the curved karahafu gable used on the Ishikawamon windows. Walk around to see them.

Interior opening is seasonal and limited. Kanazawa Castle Park runs a special opening programme for its Important Cultural Property buildings, covering the Ishikawamon and the Sanjūkken Nagaya, on Saturdays and Sundays and during holiday periods from April through November, from 9:30 to 15:30. Volunteer guides are stationed inside. The programme for fiscal 2026 runs 1 April to 30 November. Opening of the Tsurumaru storehouse has been suspended.

Inside, expect steep stairs, uneven floors and low light. Visitors describe the upper level on a wet day as genuinely dark. This is an unlit nineteenth-century magazine, not a museum interior, and the lack of illumination is the point rather than an oversight. Anyone unsteady on stairs should consider viewing from outside.

The park itself opens from 7:00 and entry to the grounds is free; the reconstructed turret complex charges separately. Buses from Kanazawa Station reach the Kenrokuen-shita Kanazawajō stop in about ten minutes, leaving a short walk. Walking from the station takes around 35 minutes. Kenrokuen garden is immediately adjacent.

Photography outdoors is unrestricted. Late afternoon light along the rampart face brings out the lead roof better than midday, when the surface flattens to grey.