Interesting alternative to traditional bug sprays here.
Kiribai is a Japanese company that specializes in high-function products like pocket warmers, pressure activated ice packets and bug repellants.
The Mushi Guard Clip is a convenient way to keep pests away. According to the package, you just clip it on your cap or a pocket and bugs will stay at least one meter away. It works for a month and costs around 600 yen retail.