Look in front of the procession

In Hiroshige’s Morning View of Nihonbashi, a lord’s procession crosses a bridge in the morning, with fish carriers in the foreground. The Met describes a departure from Edo along the Tōkaidō.^[1] Follow only the procession and the picture may seem chiefly about authority. Follow the fish and the same bridge becomes a place for everyday commerce. When using it to think about sankin-kōtai, we should resist assigning the figures to a specific domain without evidence. Start by investigating the institution and the movement separately.

Going to Edo was not an ordinary trip

Sankin-kōtai, or alternate attendance, required lords to spend periods serving the shogun in Edo. Fukuoka City Museum explains its institutionalisation through the 1635 Laws for the Military Houses, with the general rule of alternating a year in the domain and a year in Edo, while wives and children were required to reside in Edo.^[2] Arrival did not complete the obligation. A lord had to maintain life and work in two places, and travel between them. The relationship with the shogun was built into time and residence as well as ceremonial behaviour.

The journey began long before departure

For a Fukuoka lord’s attendance journey in 1838, the museum describes the selection of accompanying retainers beginning in the previous year, followed by preparations for baggage, people and horses.^[2] The time spent on the road was only part of the undertaking. Without a settled party size, requirements such as food and carrying capacity could not be organised. Thinking about those connections helps us see preparation as part of the institution. They are explanatory connections, however—not invented menus or conversations attributed to the surviving records.

Organise preparation under three headings: people, baggage and schedule. More people change the supplies and arrangements needed; different baggage changes the carrying capacity required; a schedule creates deadlines for getting ready. This is a way of reading the plan, not a reconstruction of the layout of a historical ledger. You could connect the boxes in our diagram with arrows in both directions. That makes it easier to see why a journey could not depend on the person at the front alone. Before comparing domains or the sizes of their parties, it also matters to establish which people and which expenses each record actually includes.

One itinerary is not the national standard

In this case a route using the Chūgoku road and the Tōkaidō was selected, with travel planned from Fukuoka through Osaka to Edo.^[2] It does not follow that every lord took the same road or the same number of days. Location, period and duties changed the conditions of travel. An itinerary and proof of actual arrival on a particular day are different kinds of evidence, too. We have not turned the museum’s account of a plan into a fully reconstructed travel diary. A schedule on paper gives us no licence to add fine weather or an uneventful journey.

The rule had to accommodate other duties

Fukuoka and Saga also had responsibilities for guarding Nagasaki. Fukuoka City Museum explains how these circumstances led to shortened periods of attendance in Edo for their lords.^[2] Instead of dismissing an exception as something not worth learning, ask why it was necessary. Bringing lords to Edo was not the shogunate’s only concern; there were also tasks for them to perform in their regions. How could a general rule accommodate local requirements? That question shows political adjustment at work, beyond what a single memorised sentence can convey.

Expense is not the same as a complete explanation of intent

Travel and maintaining two residences imposed costs, as the museum’s account confirms.^[2] But demonstrating a financial burden does not establish that every expense was designed solely to impoverish the lords. Purpose, practical operation and regional consequences deserve separate attention. Recognising that movement encouraged transport and cultural contact does not erase the constraints on those ordered to travel or on families required to live in Edo. Neither benefits nor burdens should simply stand in for an evaluation of the entire institution.

Beyond the length of the line

Hiroshige’s print dates to around 1833–34; it does not record the Fukuoka journey of 1838.^[1] An image of traffic and written evidence about preparations answer different questions. Putting them alongside each other shows why different kinds of sources matter. For an exam, connecting the institution with 1635 is useful. Add “who prepared it?” and “why did the schedule vary?” and the rule starts to acquire a place in people’s lives. In the next procession picture you see, will you look for the lord—or think about the preparation time that is missing from the image?