執Chronology

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500580600700800900100010801100120015401600170018001900 510–579910–9991010–10791230–1539

1

2

1

1

1

1

1

1

1

1

1

2

2

1

1

2

1

3

1

1

1

2

3

1

1

1

2

1

1

15 +9

21 +15

1

5

2

1

4

2

2

4

1

2

3

No year recorded 256

+250

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 ↗