極Chronology

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5005806006707008009009701000108011001200141015401600170018001900 520–579620–669910–9691010–10791230–14091420–1539

1

1

2

5

1

1

2

1

1

1

3

1

1

1

2

1

1

1

5

5

2

2

1

1

2

1

2

5

4

1

3

1

57 +51

24 +18

30 +24

3

1

2

4

5

25 +19

23 +17

4

3

14 +8

49 +43

27 +21

7 +1

25 +19

24 +18

3

3

4

4

4

2

No year recorded 230

+224

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 ↗