Kiera Jefferson
Japan has been facing environmental pollution, which has emerged as a significant issue in recent years. The country's rapid industrial development, economic growth, and increasing population have contributed to air, land, and marine pollution. While Japan's greenhouse gas emissions have decreased over the past decade, air pollution remains a pressing concern, causing over 40,000 deaths annually. The primary sources of air pollution in Japan are industrial production activities, vehicle emissions, and cross-border pollution from neighbouring Asian countries. Additionally, the widespread use of incineration for waste treatment and the production of plastic products have further exacerbated environmental concerns in the country.
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What You'll Learn
Air pollution from automobiles and industry
Japan has been facing air pollution issues due to automobiles and industrial activities. The country has witnessed a rise in air pollution from automobiles in recent years, with cross-border air pollution from the rapidly industrializing Asian region also becoming a concern. The combustion of fossil fuels, such as coal, oil, and natural gas, has been a significant contributor to air pollution in Japan. This has resulted in the emission of pollutants like nitrogen oxides (NOx) and sulphur oxides (SOx) from vehicles, factories, and power plants.
The Japanese government has implemented various regulations to address these issues, including tightening vehicle emission standards and promoting the use of nuclear and renewable energy sources. However, the current environmental standards are still considered insufficient to protect health and the environment effectively. The Air Pollution Control Law regulates sulphur oxides and nitrogen oxides emissions, and companies are required to install dust collectors to mitigate these pollutants.
The annual average concentration of PM2.5 in Japan has been declining due to regulations on soot and smoke-generating facilities, such as factories and vehicle emission standards. However, PM2.5 concentrations fluctuate seasonally, typically increasing from March to May. Short-term exposure to air pollution can lead to itchy eyes, nose and throat, wheezing, coughing, chest pain, headaches, nausea, and respiratory infections.
Diesel vehicle registration restrictions and low-emission zones have been implemented in some prefectures to reduce NOx and PM2.5 levels. Tokyo, for example, introduced diesel vehicle driving restrictions in 2003 to enhance air quality. While road traffic flow management is important, it is not sufficient to meet the new WHO air quality targets, and more comprehensive road sector policies and interventions beyond road transport are necessary.
In addition to air pollution from automobiles and industry, waste incineration and plastic waste generation also contribute to Japan's air pollution challenges. The incineration of waste, despite filtering technologies, releases greenhouse gases, exacerbating air pollution and global warming. The Japanese government has promoted the 3R initiative (reduce, reuse, recycle) to address waste pollution, but the country's waste recycling rate has remained low, around 20% over the past decade.
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Water pollution
Japan's freshwater systems have improved significantly since the rapid economic growth of the 1950s and 1960s. During this period, over 40,000 people were affected by water pollution-related diseases caused by factory runoff. Within 20 years, water pollutant loads dropped by 90% due to progressively stricter water pollution standards. However, Japan still faces coastal water pollution caused by petroleum hydrocarbons, pesticides, dioxins, dibenzofurans, and the integrated circuit industry. Many semi-enclosed estuaries remain severely polluted, and the majority of Japan's rivers do not meet environmental water quality standards.
The impact of water pollution in Japan has been severe, with outbreaks of mercury and cadmium poisoning in humans and large fish kills. The strong Japanese preference for fish and shellfish in their diet has led to increased attention to the potential chronic effects of water-borne toxic chemicals on aquatic life. For example, the removal of contaminated sediments from Udono Harbour and the Shingu River Estuary reduced the incidence of tumours in fish.
Plastic pollution is a critical issue for Japan, as it is one of the largest producers and consumers of plastic products. Microplastic rates in Japan's coastal waters are 27 times higher than the global average and are found in most fish caught in the country. The Japanese government has responded to these challenges by implementing robust pollution control programs, tightening regulations around industrial emissions, and investing in recycling and waste management technologies.
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Waste pollution
Japan has a reputation for maintaining comfortable living conditions through proper waste management. However, waste pollution has been a significant environmental issue for centuries. In the late 19th century, Japan faced a waste problem due to modernisation, with garbage often being discarded on roadsides, leading to unsanitary conditions. The country's rapid urbanisation, economic development, and industrialisation further exacerbated the issue, with industrial waste being improperly treated or disposed of, resulting in air, water, and land pollution.
To address these challenges, Japan implemented waste management policies and recycling technologies. The first policy, the Waste Cleaning Act, was enacted in 1900, followed by various other policies aimed at improving public health, addressing pollution, and protecting the living environment. Japan's environmental protection efforts gained momentum in the 1960s, with the recognition of the Four Big Pollution Diseases, which were caused by chemicals discharged from factories. In 1970, during the National Diet session, fourteen laws were passed to tackle pollution decisively. This marked a turning point in Japan's environmental policy, leading to the establishment of the Environmental Agency in 1971, which later became the Ministry of the Environment.
Despite these efforts, Japan continues to face challenges in waste management, particularly in reducing its reliance on incineration and landfills. Incineration is the most widely used waste disposal method in Japan, favoured for its ability to reduce waste volume in a country with limited landfill space due to its mountainous terrain. While advancements in incineration technology have reduced the presence of hazardous materials in the air, the process still produces exhaust fumes that contribute to climate change. Additionally, Japan has one of the lowest recycling rates among OECD countries, although community-led initiatives are pushing for change.
The Japanese government has promoted the 3R initiative (Reduce, Reuse, Recycle) and the Resource Circulation Strategy for Plastics, aiming for all plastic packaging to be reusable or recyclable by 2025. Customers are increasingly using reusable containers and bags, and companies are exploring alternatives to plastic products, such as paper packaging. While these measures show promise, Japan still needs to reduce its overall plastic consumption and transition from incineration to more sustainable waste management practices to effectively address waste pollution.
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Natural disasters
Japan has a long history of pollution, with the Meiji government's policy of encouraging rapid industrial development leading to severe environmental degradation. Post-World War II, Japan's swift industrialization and heavy industrialization policies caused a massive increase in pollutants, leading to terrible pollution-related diseases such as Minamata disease and Yokkaichi asthma.
Today, Japan faces modern pollution challenges like microplastic contamination, with plastic waste emissions being the second-highest per capita, and urban air quality issues. The primary sources of Japan's air pollution are industrial operations, vehicle emissions, and cross-border air pollution, mainly relating to fossil fuel combustion.
To address these issues, Japan has implemented various environmental policies and regulations. The Water Pollution Control Law, enacted in 1970, prohibits the discharge of wastewater that does not meet quality standards. The country also promotes the 3R initiative to reduce, reuse, and recycle waste, although recycling rates remain low. Japan has also invested in nuclear and renewable energy sources to reduce greenhouse gas emissions.
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Fossil fuel combustion
Japan has long been a major consumer and importer of energy and a recognised leader in energy technology development. Fossil fuels remain important sources of energy production in Japan, with natural gas being the largest source of electricity production. However, since fossil fuel burning produces greenhouse gas emissions, it is the main contributor to global warming and air pollution. In recent years, Japan has been one of the largest carbon dioxide emitters worldwide, with fossil fuels accounting for over 72% of the country's energy mix.
The burning of fossil fuels such as coal, oil, and natural gas for power generation, transportation, and industrial processes is the primary source of CO2 emissions in the energy sector. Power plants, industrial facilities, and automobiles are the main sources of air pollution in Japan. In addition, the country's high electricity demand for its global leading manufacturing industry has contributed to its position as one of the largest energy consumers worldwide.
While Japan's energy consumption has declined over the past decade, its dependence on imported fossil fuels has increased. Over 99% of the country's crude oil supply and nearly 98% of its natural gas supply are imported, primarily from Middle Eastern countries. This heavy reliance on fossil fuel imports has made Japan vulnerable to external supply shocks and price fluctuations, as seen with the gas shortages and increased electricity prices in 2021.
To address these issues, the Japanese government aims to reduce greenhouse gas emissions, decrease dependence on fossil fuel imports, and enhance energy security. They plan to replace fossil fuels with renewable and nuclear energy sources. The share of renewable electricity production has increased to nearly 22%, and the country intends to be entirely emission-free by 2050.
However, there has been international criticism of Japan's slow progress in abandoning fossil fuels and expanding renewable energy sources. The Fukushima nuclear disaster in 2011 led to a further reliance on fossil fuels, and nuclear energy remains controversial. Nevertheless, nuclear power is expected to play a crucial role in Japan's transition away from fossil fuels.
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Frequently asked questions
Yes, there is air pollution in Japan. In recent years, the annual average concentration of PM2.5 in Japan has been declining due to regulations on soot and smoke-generating facilities, but air pollution causes over 40,000 deaths annually.
The main sources of air pollution in Japan are industrial production activities, vehicle emissions, and cross-border air pollution. Fossil fuel combustion from power plants and industrial facilities is a major cause of air pollution, and most pollution areas are highly populated, urban areas.
The Japanese government has introduced various regulations such as tightening automobile emission regulations and promoting the spread of low-emission vehicles. They also aim to reduce their use of fossil fuels and increase their nuclear and renewable energy share.
Short-term symptoms resulting from exposure to air pollution include itchy eyes, nose and throat, wheezing, coughing, chest pain, headaches, nausea, and upper respiratory infections such as bronchitis and pneumonia. Air pollution can also exacerbate asthma and emphysema and cause asthma, cancer, heart diseases, allergies, and other health conditions.
Imari, Saga has the most polluted air in Japan, possibly due to the widespread manufacture of porcelain in and around this area. Tokyo is also one of the most polluted cities in Japan, with a US AQI figure of 47 at the beginning of 2021.
