Japan had 50 new coal-fired power plants in the pipeline after the Fukushima disaster shut down the country's nuclear fleet in 2011. With energy security suddenly dominating the conversation, coal looked like the obvious gap-filler, and the number of proposed projects kept climbing. Kimiko Hirata, who had spent nearly two decades working on climate policy with the nonprofit Kiko Network, shifted her focus to coal. Her strategy combined local community outreach, financial risk arguments, public health data from air pollution, and eventually what became Japan's first shareholder climate activism. In 2020, she co-filed a proposal at Mizuho, one of Japan's largest banks and at the time the world's biggest coal financier, asking the company to disclose a business plan aligned with the Paris Agreement. It received 34 percent shareholder support, including from large institutional investors.
The result of that years-long effort: 17 of the 50 proposed coal projects were cancelled, totaling 9 gigawatts of capacity that will not be built. Hirata estimates that avoids roughly 50 million tons of CO2 per year and around 1.7 billion tons over the lifetime of those plants, an amount she equates to removing more than 8 million cars from the road every year for four decades. The Mizuho proposal drew attention because shareholder climate activism was already well established in Europe and the United States but was genuinely new in Japan. Getting institutional investors to back a 34 percent result on the first attempt shifted how companies and investors in Japan thought about climate exposure as a financial risk, not just an environmental one.
Hirata now runs Climate Integrate, an independent think tank she founded to build the affirmative case for renewable energy in Japan. She describes this as a shift from opposing coal to actively advocating for alternatives, a harder problem because the public debate in Japan still features live objections: renewable energy is too expensive, not reliable enough, and wind or solar projects sometimes face local resistance over land use and environmental concerns. Her current work involves partnering with specific cities to develop credible transition plans. Toyooka, known for hot springs and ski tourism, is targeting decarbonization through sustainable tourism. Ichikawa, a dense residential area near Tokyo, is promoting rooftop solar and efficiency retrofits aimed at young families. Sakata, a northern city near existing coal infrastructure with strong offshore wind potential, is developing offshore wind as a route to economic revitalization and a managed transition away from fossil fuels.
Bottom line: Hirata's approach is worth studying regardless of where you stand on energy policy. She spent years translating climate risk into the language each audience actually responds to, and changed tactics when the first one stopped working. The shift from stopping coal to building the case for renewables is harder work, and she is honest that she doesn't yet know if this phase succeeds.