While overall annual snowfall is expected to decrease, the report notes that extreme snowstorm conditions may lead to increased snowfall in certain areas.

This report, the second since the initial study published in 2020, aims to assist both central and local governments in enhancing their climate change strategies.

A recent report titled 'Climate Change in Japan 2025' warns that a significant rise in global temperatures could lead to extreme weather events becoming a common occurrence in Japan.

The report outlines two potential temperature scenarios: a '4-degrees scenario' predicting a rise of 5.1 degrees Celsius by the end of the century, and a '2-degrees scenario' that aligns with the Paris Agreement, projecting a 2-degree rise.

Specifically, the report indicates that high temperatures could occur almost annually, with heavy rainfall events predicted to happen 5.3 times more often than the historical once-in-100-years benchmark.

In terms of tropical nights, the annual occurrence is expected to rise from 25 to about 56 days, with Tokyo facing a staggering increase from 32 to approximately 92 days.

Despite Japan's central government aiming for virtually zero greenhouse gas emissions by 2050, the average temperature has already increased by 1.3 degrees since the early 20th century.

Concerns are also raised regarding the decreasing oxygen concentration in seawater, which could adversely affect marine habitats by the end of the 21st century.

The report cites extreme temperature events from July 2018 and July 2023, asserting that these events would not have occurred without the influence of global warming.

The report forecasts a coastal sea level rise of around 68 centimeters and a 78 percent decrease in sea ice in the Sea of Okhotsk by century's end.

Under the '4-degrees scenario,' extreme temperatures would be nearly 6 degrees higher than pre-industrial levels, leading to a dramatic increase in the frequency of extreme weather events.

Additionally, the study forecasts a rise in 'extremely hot days' with maximum temperatures reaching 35 degrees Celsius, as well as an increase in 'true summer days' where temperatures exceed 30 degrees.