于Chronology

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5005806006707408309001100120015401600172018001900 510–579620–669680–739750–829840–899910–10991290–15391670–1719

1

1

2

6

1

3

2

1

1

1

2

1

1

2

1

1

1

1

1

2

7 +1

1

1

9 +3

5

2

1

1

2

No year recorded 335

+329

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 ↗