存Chronology

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610700830100011001220159016001700178018001900 620–699750–829840–9991010–10991160–12191290–15891730–1779

1

1

1

2

2

1

2

2

1

1

1

1

5

1

3

1

1

27 +21

3

1

5

1

7 +1

15 +9

162 +156

2

6

8 +2

5

1

13 +7

6

1

4

1

No year recorded 722

+716

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 ↗