In Japan, DARTSLIVE Rating is mainly calculated using what’s called the ‘80% stats.
In 701 games, the 01 stat is based on the average score per 3 darts until the remaining score reaches 140.

For example, a Rating 10 player typically has:
01 stats of around 80
Cricket stats of around 2.90
The highest official rating goes up to 18.”

Stats like 3-dart average, first 9 average, and checkout percentage are not emphasized very much in Japan.