There is a community sunflower field maze in the Horigane area of Sayama City every August. The sunflowers typically bloom the last two weeks in August. It doesn't feel like a particularly large sunflower field as you walk among the blooms, but supposedly there are about 10,000 sunflowers.
Thanks to the height of the sunflowers and the density per square meter, the Horigane sunflower field makes the perfect sunflower maze. The sunflowers grow to about 1.7 meters. To be honest, for an adult it is quite easy to get from start to finish. But children will delight in getting lost among the towering blooms. There is a dais in the middle of the field to help people get their bearing. It also doubles up as a convenient place to take a photo.
The sunflower maze is free, but if you want to take some home, it costs ￥100 for five sunflowers.