あと雪国はアイスランドみたいに室内練習場を整備しよう
http://www.telegraph.co.uk/content/dam/football/2016/06/03/indoor_pitch_trans_NvBQzQNjv4BqqVzuuqpFlyLIwiB6NTmJwfSVWeZ_vEN7c6bHu2jJnT8.jpg
https://i2-prod.dailyrecord.co.uk/incoming/article6836993.ece/ALTERNATES/s615b/JS55182555.jpg
https://www.spyn.co/blog/wp-content/uploads/indoor-facilities.jpg
