守Chronology

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510610700800900100011001200141015401600170018001900 520–609720–799840–899910–9991010–10991230–14091420–1539

2

2

1

4

1

1

1

3

1

3

2

1

3

1

1

1

2

4

1

1

1

1

6

2

2

2

29 +23

8 +2

2

72 +66

1

1

25 +19

9 +3

10 +4

24 +18

5

3

38 +32

6

13 +7

3

18 +12

8 +2

1

6

22 +16

2

31 +25

2

No year recorded 967

+961

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 ↗