First, a conversion chart for the Japanese calendar system. Traditionally, the year is recorded as the year in the reign of a particular emporer. For example, I was born in Showa 58, or 1983. The Koseki will only show the Japanese year, not the western year, but you can look it up here (click to view larger):
Another problem is that koseki may use antiquated characters. I'll include some additional charts for other kanji in other posts, but for now here is a chart that shows various written forms of each number.
