Hosobuchi-ke Jutaku Nagayamon

A Late Edo Gatehouse That Arrived in Numakage Second-Hand

Hosobuchi-ke Jutaku Nagayamon (細淵家住宅長屋門, also written Hosobuchi-ke Jūtaku Nagayamon, the gatehouse of the Hosobuchi residence), at 1-17-8 Numakage in Minami Ward, Saitama City, is a timber gate structure built in the late Edo period and moved to its present site during the Meiji era. It was entered on Japan's national register of Tangible Cultural Properties on 2 March 2006.

A nagayamon is a gate with rooms attached: literally a longhouse gate, a single ridge under which the opening occupies part of the length and enclosed space occupies the rest. Guards, servants, tools, and grain all lived in gates of this type. The right to build one was a marker of rank, which is why the form spread from samurai compounds to the wealthiest village households in the eighteenth and nineteenth centuries.

This one occupies 30 square metres. It stands along the eastern boundary of the Hosobuchi compound with its ridge running north to south, roofed in kirizuma-zukuri, a straight gable, and covered with sangawara pantiles. The southern half is the opening. The northern half is enclosed room, described by Saitama City as a guard station.

The Agency for Cultural Affairs dates the fabric to somewhere between 1751 and 1829, and the relocation to the years between 1868 and 1911. That means the gate is roughly a century older than the main house standing behind it. The compound's oldest building is also its most recent arrival.

The Iwatsuki Castle Tradition and Why Specialists Accept It

The Hosobuchi family holds that the gate came from Iwatsuki Castle. Local traditions of this kind attach themselves to old buildings across Japan and are usually treated with caution. This one is not. The Agency for Cultural Affairs states in its own record that the tradition carries high reliability, and gives its reasons: the form of the structure and the character of its details.

The details in question are metal. The gate uses zelkova throughout, and the doors carry chibo-kanagu, the rows of domed studs that armour a gate leaf, together with hasso-kanagu, the decorative plates fitted where hinge straps meet the frame. Fittings of this density were expensive and were governed by convention. A farmer's gate did not get them. The Agency's assessment describes the weight and bearing of a samurai gate rather than a rural one.

Iwatsuki was a castle town on the northeastern side of what is now Saitama City, and its castle was abolished in 1871, early in the Meiji era. The relocation window given by the Agency, 1868 to 1911, opens onto exactly that period of dismantling. Structures from the castle were dispersed in these years; the Kuromon, a gate now standing in Iwatsuki Castle Park and thought to have served as the nagayamon of the lord's residence in the third bailey, was taken to Urawa and pressed into service as the main gate of the Saitama prefectural office, then sold back to Iwatsuki in 1954 and re-erected on its present site in 1970.

None of this proves the Numakage gate's origin. What it establishes is that the tradition fits the period, the region, and the evidence in the timber, which is a stronger position than most family histories occupy.

Reading the Gate From the Lane

The gate is the part of the Hosobuchi compound you actually see. It faces the public road directly, and the main house behind it shows only as roofline above the wall.

Look first at the eaves over the opening. They are carried on degeta-zukuri, a construction in which the purlin is pushed out beyond the wall plane on projecting beam ends, giving the eaves reach and the front of the gate a deep shadow. Below, a pair of doors hangs at the centre of the opening. At the northern end sits the kuguri-do, a small wicket cut for ordinary daily passage so that the main leaves could stay shut. Saitama City adds one further feature: the gate opening is recessed inward from the face of the building, a treatment the city calls tachigakure.

Access is exterior only. The interior of the gate and the grounds beyond are both closed, there are no opening hours or admission charges, and Saitama City asks that anyone coming to look does so without disturbing the household or the neighbours. Photography is not prohibited from the public road, but the lens belongs on the building rather than on the property behind it.

Musashi-Urawa Station is about three minutes away on foot, its east exit facing the right direction. Trains reach it from Shinjuku in roughly 25 minutes on the Saikyo Line, and the Musashino orbital line stops there too.

If the castle connection is what draws you, Iwatsuki Castle Park in Iwatsuki Ward is the follow-up. The Kuromon and the Uramon both stand there in the open and can be walked up to, and the park is a short walk from Iwatsuki Station on the Tobu Urban Park Line. For an old building you can enter rather than circle, Urawa Kurashi no Hakubutsukan Minkaen in Midori Ward keeps seven relocated structures, including an Edo-period front gate, with free admission from 9:00 to 16:30 and closure on Mondays.