Twelve, which is the number of months (calendar), added by twenty-four, which comes from Nijushi sekki (days that divide a year in the old lunar calendar into twenty-four equal sections), and by seventy-two, which comes from Shichijuni-ko (72 divisions of the solar year), makes one hundred and eight and represents one year.
月(暦)の数の12、二十四節気の数の24、七十二候の数の72を足した数が108となり、1年間を表す。