This question is also answered by the MHLW statistics [1]. On page 2, the line graph at the top represents the percentage of available paid leave days taken on

This question is also answered by the MHLW statistics [1]. On page 2, the line graph at the top represents the percentage of available paid leave days taken on average, with the absolute numbers below. So, the average worker in Heisei 25 (2013) had 18.5 days of leave, of which he took 9.0, or 48.8%. (Not including public holidays.) [1] https://www.mhlw.go.jp/file/05-Shingikai-11201000-Roudoukijunkyoku-Soumuka/0000069063.pdf https://www.mhlw.go.jp/file/05-Shingikai-11201000-Roudoukiju... (in Japanese)