専Chronology

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500580600710800900100010801100120014101540165017701800 510–579620–709750–799910–9991010–10791230–14091420–15391550–16491670–1769

1

1

1

1

1

4

3

1

2

1

1

1

1

2

1

1

2

1

2

1

1

1

1

6

2

6

1

9 +3

2

No year recorded 86

+80

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 ↗