In the book, the era name “Angen” was introduced at the beginning of the story, but the era name never appears in the story afterwards. You may have noticed that the calendar date is never mentioned in the story, except for the New Year’s Day. This is because there were too many era names during this period: Total eighteen era names during the period from Angen 2nd (1176) to Karoku 1st (1225). This means that, on average, one era name was used only for 2.7 years during this period. It is very confusing and is very difficult even for Japanese people to follow the chronology by using the era names. Furthermore, in this period, the lunar calendar was used in Japan, and sometimes “intercalary month” (in Japanese, it is called “Uru” month) was inserted to the calendar year to adjust the gap. Therefore, I thought that the reference to the calendar months and dates that were used in this era would be too confusing for the English-speaking readers.

Having said that, I am happy to provide a list of events here, most of which have been confirmed by the primary courses, with the original dates according to the Japanese calendar as well as the corresponding dates according to the Julian calendar.

Note: When only the date is missing but the month is shown in the Japanese calendar, the Julian calendar’s date in the table corresponds to the first day of the month in the Japanese calendar.