波Chronology

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460500580600700800900960100011001200141015401600170018001900 520–579750–799820–899910–9591010–10991290–14091420–1539

1

1

1

2

1

1

4

1

1

2

1

1

4

1

1

1

1

1

3

1

2

1

3

1

2

1

1

1

1

1

3

1

2

35 +29

10 +4

14 +8

3

2

5

3

12 +6

15 +9

1

9 +3

12 +6

19 +13

2

1

19 +13

25 +19

4

3

8 +2

7 +1

8 +2

1

No year recorded 191

+185

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 ↗