Are bananas a magic diet food?

There's a diet craze going on in Japan called the Morning Banana diet that's been all over the TV and web sites. Check out this article on WebMD. Your first thought may be "why is there a diet craze in Japan? Aren't they a pretty lean population?" It was my first reaction but I guess it's a good indication that the issue of overweight has gone global.
Essentially the diet says that in the morning if you eat only bananas and water, have no dairy products, alcohol, or food after 8 PM then you will lose weight. It allows any food for lunch, dinner and snacks. Sound ridiculous? Well, much of it is - there's nothing magical about bananas that make it a diet superfood moreso than any other fruit - but there are some principles in the plan that (when tweaked a bit) can help in losing weight and keeping it off which we talk about in the Baby Fat Diet.
1. They say: Drink only room temperature water. We say: Stick primarily to non caloric drinks; water is an excellent choice, but tea and coffee are okay too and have lots of disease-fighting antioxidants.
2. They say: Don't eat after 8 PM. We say: Stop eating 2-3 hours before bed; late night eating is usually mindless munching of empty calories.
3. They say: Have only bananas and water for breakfast. We say: Eat a fiber-filled, well balanced breakfast. Have as many colorful fruits and vegetables as you can in your day, aiming for at least 5; they are filling for few calories and have tons of nutrients.
4. They say: Exercise only if you want to. We say: Incorporate movement into your day as much as possible by actively playing with your kids and make an effort to work up to 30 minutes a day of deliberate exercise; it's very important to helping take the weight off, keep it off and keep you healthy for life.
As for the Japanese, they traditionally eat lots of fish, brown rice and vegetables, foods that are certainly healthful and relatively low in calories. I'm thinking just go back to that eating plan and overweight won't be a problem.