The Kyoto Protocol aimed to slow down global warming, but I have a better way of dealing with global warming in Japan. It requires each person to walk outside of their house with a jackhammer and remove a 1-meter slab of concrete.
Imagine how much cooler Japan would be if we got rid of 120 million sq. meters of unnecessary concrete! Concrete retains huge amounts of heat. See for yourself: The next time you are walking on a sidewalk, just reach down and touch the pavement. Everyone knows that pavement gets hot enough that you cannot walk on it in bare feet. Although shoes protect our feet from the the heat, it is still there, rising up from the ground. It's like having an entire city resting on an electric burner. This is like playing with fire. If forest fires can break out naturally from heat and dry weather, I suspect our cities could burst into flames at any moment.
Even at night, you'll find the concrete is still warm hours after the sun has set. Many people point out that Japan does not have enough trees in their cities. Trees? There's not even a blade of grass to be found in the city. Not even a weed. Everything from parks to rivers has been paved. On my planet, the U.S., we also use concrete for roads and sidewalks. But we only use it in parts that have people walking or driving on them. Untrodden ground is left as is. This results in a strip of unpaved ground between the road and the sidewalk that sometimes has grass on it, but usually has weeds, cigarette butts and trash, as no one maintains it. But I'd like to hug that strip of dirt! At least it is not concrete.