Crossroads Asia | Environment | East Asia

Fire Devastated a Mongolian Nature Reserve. Who’s to Blame?

The fire in Numrug touches on cross-border capital compliance risks and geopolitical changes impacting Northeast Asia’s ecology.

This image, provided by Mongolian state news agency Montsame on Oct. 20, 2026, shows fire-ravaged grassland on the left, and grassland that survived to the right of the creek.

On October 8, a massive fire broke out in Numrug, a nature reserve in Khakhgol soum, Dornod aimag (province), Mongolia. The flames were not completely extinguished until October 16.

According to statistics from the Ministry of Natural Environment and Climate Change of Mongolia released on October 28, the total area burned by the fire amounted to 504,960.4 hectares, approximately 5,050 square kilometers or 1.2 million acres. That’s more than twice the area of Tokyo, Japan’s capital. Nearly all of the damaged land – 448,993.6 hectares – was in the Numrug Strictly Protested Area. Over three-quarters (76.4 percent) of the nature reserve’s total area was affected by the fire. 

According to preliminary investigations by Mongolian authorities, the fire was directly caused by a vehicle convoy belonging to Mongolian mobile communication operator Mobicom, which is 98.8 percent controlled by Japanese telecommunications giant KDDI. The chassis of one vehicle became wrapped in dry plants, and prolonged driving caused friction and heat to ignite the grasses. That set off the larger fire. 

The fire was located in an area adjacent to the China-Mongolia border, and the issue was compounded by the involvement of a Japanese firm and disputes over border communication infrastructure. Thus it quickly escalated from an ecological event to a geopolitical issue affecting Mongolia, China, and Japan, becoming a landmark sample for observing the logic of cross-border environmental governance and capital regulation in Northeast Asia.

Shortcomings in Ecological Governance 

The Numrug Strictly Protected Area is located in the transitional zone between the western foothills of the Greater Khingan Range and the eastern grasslands of Mongolia. It is an important source of biological diversity and an ecological security barrier in Northeast Asia, inhabited by various rare species listed in both the IUCN Red List and Mongolian Red Book, such as the Ussuri moose, black billed capercaillie, and Far Eastern taimen fish, as well as more than 250 species of birds. 

The impact of high-intensity burning in autumn on the ecosystem is long-term and irreversible. The organic matter on the surface of the soil is completely carbonized, and the soil’s ability to retain water and nutrients has been greatly diminished. When strong winds arrive in spring and autumn, the risk of regional desertification and sandstorms will significantly increase.

The native vegetation seed bank has also suffered a devastating blow. According to ecological observation data from cold and arid grasslands, it will take at least 20 to 100 years for the native community in this area to fully recover, and permanent species replacement may occur in some areas.

The fire points to an alarming structural failure of environmental governance in Mongolia, even within a protected nature reserve. On the one hand, the government is known for “heavy approval, light supervision” and “heavy firefighting, light prevention.” During autumn, the high-risk period for fires, the core protected areas are still open to commercial vehicles. There is a complete lack of environmental risk assessments and fire prevention verification before human activities. 

On the other hand, there is a lack of ecological monitoring and emergency response capabilities. Minister of Natural Environment and Climate Change Sandag-Ochir Tsend admitted that due to the complex terrain and logistical conditions, it is difficult to carry out on-site assessments after disasters. Mongolia’s remote areas have long relied on satellite remote sensing monitoring, and there are obvious shortcomings in the logistics support capabilities for ground verification and emergency response.

Cross-border Ecological Risk and Geopolitical Implications

The fire line approached the Mongolia-China border, directly triggering a cross-border emergency response. According to the 1999 agreement between China and Mongolia on Forest and Grassland Fire Prevention in Border Areas, more than 3,400 professional firefighting and emergency forces were quickly mobilized in Inner Mongolia, China. China was able to keep the fire from crossing the national border, while keeping a passage open for wild animals escaping across the border.

Liu Zhiyan, a researcher at the Institute of Ecological Civilization of the Chinese Academy of Social Sciences, pointed out that the grasslands in eastern Mongolia are highly interconnected with ecology in northern China. If the fire spreads across borders, it will not only cause huge economic losses, but may also trigger serious diplomatic disputes. Viewed in this light, Mongolia’s passive approach has given it the image of  an “ecological risk exporting country.” 

The Chinese side invested a large amount of manpower and material resources to intercept the fire. Now China is demanding that it be compensated for the effort – not by Mongolia, but by Japan.

The illegal entry of Japanese companies into the core protected area and the resulting catastrophe have directly undermined Japan’s long-standing image as a responsible green investor in Mongolia. 

According to the Japanese embassy in Mongolia, Japan’s official development assistance (ODA) to Mongolia from 1977 to 2021 has accumulated to 364.107 billion yen, covering multiple fields such as infrastructure, energy, and communication. Mobicom was once a benchmark project for Japan Mongolia economic and trade cooperation. Now public anger is running high. 

Early on, Mobicom sought to avoid responsibility, saying it had followed “complete legal procedures.” It only publicly apologized and promised to cooperate with the investigation after the public opinion pressure escalated. While Mobicom has now agreed to provide compensation, after a joint working group assesses the loss and damage, the company still insists that it had the proper permits and took necessary precautions.

Mobicom stated that its vehicles entered the protected area to conduct 4G network communication tests, but the project is located adjacent to the Mongolia-China Sumber-Rashaan Border Port, and its technical and economic rationality has been widely questioned by the Mongolian public. According to the 2010 Sino-Mongolian Treaty on the Management of the Border Regime, both sides must give prior notice of major border projects and wireless facilities construction. Thus Mobicom’s presence in the border area also could have an impact on mutual trust in border security between Mongolia and China. Some analysts in Chinese media have raised concerns about information security regarding Japanese communication projects in sensitive border areas, but these claims have not been officially confirmed.

Adding to the discontent, Japanese Chief Cabinet Secretary Kihara Minoru did not make an official statement until October 26, two weeks after the fire broke out. He then only mentioned Japan’s willingness to assist Mongolia in ecological restoration, with no mention of the impact on China. This further exacerbated the geopolitical rift.

On October 29, Japanese Prime Minister Takaichi Sanae held 10-minute telephone call with Mongolian Prime Minister Uchral Nyam-Osor, marking the highest‑level bilateral exchange since the disaster. During the call, Takaichi stated that the government of Japan “takes seriously the scale of the damage caused” by the fire, “and extended her heartfelt sympathies to the people of Mongolia.” 

She said that Japan “intends to provide a package of cooperation that contributes to the recovery of the affected areas, including the provision of necessary equipment to Mongolia and human resource development in the fields of recovery from the wild fires and environmental restoration.” The package will be based on an on‑site assessment from Japan International Cooperation Agency (JICA) experts in forestry and natural environment conservation dispatched on October 27. Takaichi pledged “close communication” with the Mongolian government through the assessment and compensation process. 

In response, Uchral briefed Takaichi on the full extent of the disaster damage. He expressed deep gratitude for Japan’s sympathy and support offer, and welcomed Japan’s “science‑based approach” to advancing “ecological restoration in a phased and effective manner,” adding that Mongolia stands ready to cooperate closely with Japan on all recovery efforts. The two leaders also agreed to further strengthen bilateral friendly relations and practical cooperation ahead of the 55th anniversary of the establishment of Japan‑Mongolia diplomatic relations in 2027. 

According to the official readouts released by both governments, the brief conversation focused exclusively on Japan‑Mongolia bilateral relief and diplomatic agenda. No reference was made to China’s large‑scale firefighting deployment along the border, nor to the cross‑border spillover risks the fire had posed to Chinese territory. 

Three Countries, Three Positions

The incident has caused strong reactions in the political, academic, and public........

© The Diplomat