Rising entrepreneurs are often treated like heroes, with the media lionizing the way their startups lure sizable investments and how their innovative products might change the world.

But their lives can be rough, as they are more likely to face troubles than leaders in other fields. Consequently, some may end up developing a mental illness, affecting their career.

With more investment pouring into Japanese startups in recent years, it's possible that more entrepreneurs may be plagued by such an issue.