From 8pm on April 5th you can apply for the famous Hokkaido Marathon.
The marathon is known to be a tough marathon because of the heat. Regardless, thousands of runners take the challenge and the opportunity to run through the streets of Sapporo. If you are a runner in Hokkaido its one of the first questions non-runners and runners alike will ask, "Have you run the Hokkaido marathon?" Well, have you?
The event has an English page on their website. You can see that at the link below.
You can apply at their runnet page above or you can download an application and apply via post.