| 摘要 |
PROBLEM TO BE SOLVED: To use a ready reckoner lifelong and to grasp the years of Buddhist masses and anniversaries by dividing the outer periphery of the disk of an outer wheel which rotates and the outer periphery of the disk of a fixed intermediate wheel equally by 100 and entering era years and ages. SOLUTION: The outer peripheries of the outer wheel disk 1 and intermediate wheel disk 2 are divided equally by 100, and 100 as an dominical year and 100 as an age are indicated. This ready reckoner is fixed at an age of 0 (100) of the intermediate wheel disk 2 directed upward. When the rotary outer wheel disk 1 of the dominical year is set to the age of 0, a person who desires to know how old the person is will see the full age after the birthday and the full age plus one before the birthday. When the year of death of a person is marked on the year wheel, the years of Buddist masses can be found early (namely, the anniversaries of death are entered with the numbers of years which are each one year less than the age). The Meiji era, Taisho era, Showa era, and Heisei era are shown at the upper stage of the outer periphery of the outer wheel disk 1 and the time after 2000 (the 12th year of the Heisei era) is shown at the lower stage of the outer periphery. Consequently, an age above 100 can be seen.
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