要Chronology

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510580600670700800900960100010801100122015401600170018001900 520–579620–669750–799840–899910–9591010–10791160–12191230–1539

2

1

4

4

1

1

1

1

1

3

1

1

1

1

2

1

3

1

2

1

5

1

1

5

3

3

1

1

2

2

4

2

11 +5

1

5

5

9 +3

9 +3

3

4

6

1

7 +1

2

14 +8

6

No year recorded 233

+227

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 ↗