I would like to know why Japan is still using year numbers, for example, why this year, 2019, is now called "Heisei Era" in Japan.

Because Japan's emperor has been sitting on the throne for thousands of years and hasn't collapsed or died or anything like that, Japan's age is very high, so the traditions that have been formed can be maintained. Korea's age is very short, 194 years before the founding of the country, many things will be abandoned, but Korea is a mono-ethnic country, the country fell and rebuilt if it belongs to the change of soup, although it will be abandoned some things, but from the national lineage of things left behind is still a lot of things.

For multi-ethnic countries, it is not easy to say, different people in power really change the sky.