策Chronology

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710800111012001590160017201800 750–799860–11091290–15891670–1719

1

1

1

1

2

1

1

2

1

1

1

2

2

2

2

2

6

3

2

No year recorded 24

+18

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 ↗