頃Chronology

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58060073080090010001100120015401600177018001900 620–729740–799810–899910–9991010–10991290–15391700–1769

1

1

1

3

2

1

3

1

1

1

1

1

1

1

1

1

1

1

2

1

2

8 +2

9 +3

9 +3

4

6

39 +33

2

15 +9

5

5

1

5

4

2

4

13 +7

4

1

No year recorded 180

+174

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 ↗