There are lots of great ideas, thank you everyone for your insights!
And Tom, you amaze me, you're a king of diets ^^
Unfortunately, I don't have any kendo school in my immediate vincinity, so I went for the wu shu instead.
I've begun to cut on the sugary things, I mean, I've limited myself to small quantities. No sugar means no energy, so I'd rather take at least a little...
Green tea seems a good idea. I've also changed how I eat rice and pasta, to boil them until they're just ready to eat (al dente), because if cooked further, the heat alters the starch to smaller sugar, thus increase blood sugar after digestion.
I try to cut on carbos too, but it's hard. I've stopped sodas and anything too sugary.
I also try to eat balanced meals, 1/3 of each nutriment "family", represented by green, yellow and red "companions". Meaning vegetables, starchy food and meat. Since it's a diet, I eat less in the morning (generally coffee and that's pretty much all), then 66% full at lunch, then normally before 20:00 at dinner (because when you sleep, you don't consume the energy at the same rate as when you're conscious, thus build fat).
But triglycerides are essential to human body mantenance so I try not to hurt my body too much, doing this.
I've also changed how I fry things.
Olive oil is great to fry things because its smoke point is high. When an oil starts smoking, it's generally a bad sign since it is generating substances you should rather not eat.
That's why I use it regularly, either sunflower oil is great too. Great for green "lifeforms" too.

I've heard that you are generally influenced by how people eat around you, in case of diabetes type 2, due to eating snacks and all.
And it's also a mental stress, since you are somewhat fighting against your own body, that naturally wants the fat.
There's also the problem with your liver, if you radically change your nutrition course.
Eating only greens without taking note of the protein aspect will stress it and modify it to the point you will actually gain weight (and end up with a damaged liver).
Maybe weight loss is linked with how to efficiently use the stored energy...