緊Chronology

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500580600700800110014101820 510–579740–799810–10991160–14091420–1819

1

1

2

1

5

1

1

1

1

1

1

1

1

1

1

No year recorded 3

Each crop stands at the decade of the first year its book's date gives; a date given only as before a year stands at that year. Dates come from the catalogues and editions cited with each record. The bars draw the whole span and their counts to scale; in the strip below them, fifty years or more with no crop are folded and marked. Japanese dates converted with HuTime ↗