Arisawa Family Residence Annex

Arisawa Family Residence Annex: a fishing magnate's house that faces the sea

The ground floor of the Arisawa annex keeps a feature you seldom find in a town house: a tōri-doma, an earthen-floored passage that runs straight through the building and opens toward the Tano shore. For the family who built it, that passage was a working door rather than an ornament. The Arisawa were amimoto—the household that owned the nets and boats a fishing community organised itself around—and an opening that faced the beach made plain practical sense.

The building was finished in 1938, the thirteenth year of the Shōwa era. It is the family's hanare, a detached annex, not the main house. A roofed corridor called a watari-rōka ties it to the larger main house standing just to the north.

It is small. The plan measures three ken by three ken—a ken being the traditional structural bay of about 1.8 metres, so roughly 5.5 metres on each side—giving a registered floor area of about 31 square metres. The frame is timber, two storeys, under a gabled kirizuma roof laid with sangawara pantiles. Downstairs, beside the through-passage, sits a single six-mat room. Upstairs are two more, one of six mats and one of four.

Why a small annex became a cultural property

Japan protects its old buildings along two tracks. The stricter one, "designation," is held for the National Treasures and Important Cultural Properties judged to be of the very highest value. The lighter one, "registration," was introduced in 1996 to cast a wider net—above all over more recent buildings that give a place its character but might otherwise disappear unrecorded.

The Arisawa annex belongs to the second group. It was entered in the national register on 1 December 2003, with the listing announced later that month on the 25th, as a Registered Tangible Cultural Property under the criterion that it contributes to the historic landscape of the country.

Its value is documentary. A grand reception hall shows how a daimyō wished to be received; a modest annex like this one shows how a coastal merchant household actually arranged its property—where it placed its more private rooms, how those rooms joined the main house, and which way the whole estate turned to face the work that paid for it. The door toward the beach is part of that record.

What to notice when you visit

Looking at the building from the street, the orientation is the thing to watch. Once you know the through-passage points at the water, the annex stops reading as a generic old house and starts reading as what it is: one part of a working fishing household's compound, turned toward the sea.

The roof rewards a second look. The plain kirizuma gable and the even rows of sangawara pantiles are the ordinary grammar of pre-war Kōchi building. Nothing here is showy, which is exactly why an intact survivor is worth recording.

One practical point deserves emphasis. The Arisawa annex is a private home. There is no reception desk, no interior tour, no ticket—it is registered, not opened to the public. Enjoy it as one piece of Tano's old streetscape, photographed and admired from the public road, and leave the people who live there their privacy.

Around Tano

Tano is often called the smallest town in Shikoku, and on a map it barely registers—about seven square kilometres on the eastern coast of Kōchi. Its size misleads. In the Edo period this was a busy port that shipped the region's timber, and it sat on the road the Tosa lords travelled to and from Edo. The wealthy merchant houses that ran the town were known together as the Tano Gonin-shū, the "five houses of Tano," and a surprising number of their buildings still line the old streets, many of them now on the national register.

To step inside one, head for Oka Goten. Built in 1844, it served as the honjin—the official lodging—for the Tosa daimyō during his eastern inspections and his journeys to the capital. It is the town's one historic house kept open with an admission charge, and its formal shoin rooms give you the interior experience the Arisawa annex cannot.

From late November into February the coast offers something the rest of the year does not. On clear, cold days the low winter sun is refracted over the cooler sea and appears to split in two as it sinks—the daruma sunset, named for the rounded shape it briefly takes on the horizon.

Tano also makes salt the slow way. At the town's sun-dried-salt workshop you can try the process yourself, though you will need to book roughly a month ahead.

Arriving is easy by rail. The Gomen–Nahari Line runs along the coast to Tano Station, which shares its building with the Tano Ekiya roadside station and its counter of local produce. The old town is a short walk from the platform.

• Oka Goten — the 1844 honjin of the Tosa lords, open to visitors with a ticket
• The old merchant streets of the Tano Gonin-shū, several buildings on the national register
• Daruma sunset over the sea, roughly late November to February
• Sun-dried-salt making, which you can try by booking ahead
• Tano Ekiya roadside station, at Tano Station on the Gomen–Nahari Line