歌Chronology

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500580600670700800900960100011001230141015401600170018001900 510–579620–669750–799840–899910–9591010–10991160–12291290–14091420–1539

1

1

3

3

1

1

1

2

2

1

1

1

2

1

1

1

1

1

1

1

1

24 +18

1

1

2

46 +40

25 +19

30 +24

16 +10

6

3

16 +10

3

11 +5

150 +144

1

9 +3

1

2

5

2

No year recorded 276

+270

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 ↗