Ancient Japanese History asks why they were made to balance.ーーAccounting tells us whether the numbers balance. --

＜Summary>

We might say, somewhat provocatively, that a “bean counter” would stop when the numbers add up. My question begins there.

“Do the numbers add up?” is an accounting question.
“How did the numbers become authoritative?” is a historical question.

The Originality of My Research

The originality of my research lies not simply in applying quantitative analysis to early Japanese administrative records, but in developing a methodological framework for understanding how numerical information was produced, verified, and transformed into authoritative state knowledge.

I approach tax registers, unit-price accounting records, population registers, and related administrative documents not merely as records that describe economic or demographic conditions, but as artifacts of administrative knowledge production. By reconstructing the processes through which figures were calculated, compared, questioned, corrected, and ultimately accepted, I seek to uncover the administrative logic that lies behind apparently routine numerical records.

This perspective shifts the central question from “Do the numbers add up?” to “Why do these numbers take this particular form?” In other words, I am interested not only in accounting, but in the process through which accounting became accountable. A numerical figure in an eighth-century administrative record was not simply a representation of an existing reality. It was the outcome of interactions among local officials, taxpayers, goods, documents, accounting procedures, and higher authorities. The study of such figures therefore provides a means of reconstructing how the ritsuryō state converted complex local realities into administratively manageable information.

This distinction is especially important when reading the Sōzei-chō (tax registers). A set of figures that “balances” should not automatically be regarded as the end point of the inquiry. The balance itself may be an administrative achievement that requires explanation. Who made the figures balance? By what procedures? On the basis of what evidence? Who checked them, questioned them, corrected them, or authorized them? And what happened when the figures did not correspond neatly to the realities of collection, storage, transfer, loss, or expenditure?

Methodologically, my research combines quantitative anomaly detection, administrative geography, documentary analysis, and the study of kinship-based power relations. These approaches are used not as separate analytical techniques but as mutually reinforcing means of reconstructing administrative processes. An anomalous figure, for example, may lead to the identification of a particular administrative action; the geographical distribution of that action may reveal the movement of goods or documents; and the officials involved may reveal networks of authority and interest that are otherwise difficult to detect.

This approach changes how administrative records should be understood. Rather than treating them as static fiscal statements, I regard them as surviving traces of a continuing process of investigation, verification, adjustment, and authorization. The important question is therefore not simply whether the figures were mathematically consistent, but how they were made acceptable as official figures. In this sense, the apparently mundane act of making an account “balance” becomes a historical source in its own right.

The broader contribution of my research is thus a new conceptual understanding of ancient governance. Numerical reasoning was not merely a technique for recording economic activity. It functioned as a technology through which the state rendered people, land, goods, and local resources legible, comparable, and administratively actionable. By tracing the movement and transformation of information through documents, officials, places, and numerical systems, my research seeks to show how the ritsuryō state produced knowledge about its own territory and used that knowledge to exercise administrative authority.

In this sense, the originality of my research lies in shifting the study of ancient administration from what the numbers recorded to how the numbers became authoritative. Numerical records should therefore be read not only as evidence of the past, but also as evidence of the processes through which a state constructed, verified, adjusted, and ultimately authorized its knowledge about the society it governed.