17 Feb 2026·Source: The Hindu

3 min

Environment & EcologyNEWS

Japan's 'Godless' Lake: A Climate Crisis Warning

Shrinking ice cover on Lake Suwa signals climate change impact in Japan.

In Nagano, Japan, a centuries-old Shinto tradition of observing the "God's Crossing" (miwatari) on Lake Suwa is becoming increasingly rare due to climate change. The phenomenon, where ice ridges form on the frozen lake surface, has not appeared since 2018. Consecutive records date all the way back to 1443.

Scientists attribute the absence to rising temperatures, as the lake requires several days below minus 10°C to freeze entirely. The tradition involves priests from the nearby Yatsurugi Shrine monitoring the lake for the crossing, which traditionally represents a god visiting his goddess wife. Research indicates that the crossing appeared almost every winter until the 1980s, but warmer temperatures have since prevented the lake from freezing over consistently.

Key Facts

The "God's Crossing" (miwatari) is a Shinto tradition on Lake Suwa in Nagano, Japan.

The phenomenon involves ice ridges forming on the frozen lake surface.

The "God's Crossing" has not appeared since 2018.

Consecutive records of the phenomenon date back to 1443.

Scientists attribute the absence of the "God's Crossing" to climate change and rising temperatures.

The lake requires several days below minus 10°C to freeze entirely.

UPSC Exam Angles

GS Paper 1 (Geography): Impact of climate change on natural phenomena.

GS Paper 1 (Culture): Impact of climate change on cultural traditions.

GS Paper 3 (Environment): Climate change mitigation and adaptation strategies.

In Simple Words

The lake in Japan isn't freezing like it used to. This is because the world is getting warmer. A religious tradition that depends on the lake freezing is now in danger.

India Angle

Many Indian festivals and traditions are tied to specific weather patterns or natural events. Changes in monsoon patterns or river flows due to climate change could disrupt these cultural practices.

For Instance

Imagine Holi celebrations being affected because the usual spring colors are delayed due to unusual weather. Or a Pongal harvest festival being impacted by drought.

This shows how climate change isn't just about melting ice caps. It's also about losing traditions and ways of life that are important to people.

Climate change is not just about the environment, it's about our culture and traditions too.

Visual Insights

Lake Suwa, Nagano Prefecture, Japan

Shows the location of Lake Suwa in Nagano, Japan, where the 'God's Crossing' (miwatari) tradition is threatened by climate change.

Loading interactive map...

📍Nagano

Miwatari Observation History

Timeline of miwatari observations on Lake Suwa, highlighting the recent absence of the phenomenon.

The miwatari tradition has been observed for centuries, providing a long-term record of winter conditions on Lake Suwa.

1443First recorded miwatari observation
1980sMiwatari appeared almost every winter until the 1980s
2018Last miwatari observation
2026Miwatari has not appeared since 2018 due to rising temperatures

More Information

Background

Climate change is a long-term shift in temperatures and weather patterns, largely due to human activities, especially the burning of fossil fuels. This releases greenhouse gases, such as carbon dioxide, into the atmosphere, trapping heat and causing global warming. The effects of climate change are wide-ranging, impacting ecosystems, weather events, and even cultural traditions. Shintoism, an indigenous religion of Japan, emphasizes the connection between humans and nature. Many Shinto rituals and traditions are deeply rooted in observing natural phenomena and seasonal changes. The 'God's Crossing' (miwatari) tradition on Lake Suwa is one such example, where the freezing of the lake and the formation of ice ridges are interpreted as a divine event. The disappearance of this phenomenon due to rising temperatures highlights the direct impact of climate change on cultural practices linked to the natural world.

Latest Developments

Globally, there's increasing focus on climate adaptation strategies to cope with the unavoidable impacts of climate change. These strategies include measures to protect vulnerable ecosystems, infrastructure, and cultural heritage sites. International agreements like the Paris Agreement emphasize the need for both mitigation (reducing greenhouse gas emissions) and adaptation. In Japan, there are ongoing efforts to monitor and document the impacts of climate change on various ecosystems and cultural practices. Scientists are studying the changes in lake ice formation and their implications for local traditions. There is also growing awareness of the need to integrate climate change considerations into cultural preservation efforts.

Frequently Asked Questions

1. What is the 'God's Crossing' (miwatari) on Lake Suwa, and why is it significant for UPSC Prelims?

The 'God's Crossing' (miwatari) is a Shinto tradition where ice ridges form on the frozen surface of Lake Suwa in Nagano, Japan. Its absence since 2018, attributed to climate change, serves as a tangible indicator of environmental degradation, a key topic for UPSC.

Exam Tip

Remember the location (Lake Suwa, Japan) and the tradition's link to climate change. Expect questions linking cultural practices to environmental issues.

2. How does the shrinking ice cover on Lake Suwa exemplify the broader impacts of climate change?

The phenomenon illustrates how climate change can disrupt not only ecosystems but also long-standing cultural traditions. The absence of the 'God's Crossing' highlights the vulnerability of cultural heritage to environmental degradation, a crucial aspect of climate change impacts.

3. What are the key dates and figures associated with the 'God's Crossing' phenomenon on Lake Suwa?

Key dates include 1443, the start of consecutive records, and 2018, the last year the crossing appeared. Key figures include Kiyoshi Miyasaka, Naoko Hasegawa, and Takehiko Mikami. Remembering these can be useful for Prelims.

Exam Tip

Create a timeline to remember the significant years related to the 'God's Crossing'.

4. Why is the disappearance of the 'God's Crossing' on Lake Suwa in the news recently?

The disappearance is in the news because it serves as a stark reminder of the tangible impacts of climate change on cultural traditions and ecosystems. It highlights the increasing frequency of extreme weather events and their consequences.

5. As a civil servant, how would you address the challenges posed by climate change to cultural heritage sites like Lake Suwa?

As a civil servant, I would advocate for implementing climate adaptation strategies to protect vulnerable cultural heritage sites. This includes promoting sustainable tourism, investing in research to understand the specific impacts of climate change on the site, and engaging with local communities to develop and implement solutions.

6. What is climate adaptation, and how does it relate to the situation at Lake Suwa?

Climate adaptation refers to adjustments in ecological, social, or economic systems in response to actual or expected climatic effects. In the context of Lake Suwa, adaptation could involve strategies to preserve the cultural significance of the 'God's Crossing' tradition despite the changing climate, such as documenting the tradition or finding alternative ways to celebrate it.

Practice Questions (MCQs)

1. Consider the following statements regarding the 'God's Crossing' (miwatari) phenomenon on Lake Suwa, Japan: 1. The phenomenon involves the formation of ice ridges on the frozen lake surface. 2. It is a Shinto tradition where the ice ridges are interpreted as a god visiting his goddess wife. 3. The phenomenon has consistently occurred every winter since records began in 1443. Which of the statements given above is/are correct?

A.1 and 2 only
B.2 and 3 only
C.1 and 3 only
D.1, 2 and 3

Show Answer

Answer: A

Statement 1 is CORRECT: The 'God's Crossing' (miwatari) phenomenon does involve the formation of ice ridges on the frozen surface of Lake Suwa. Statement 2 is CORRECT: In Shinto tradition, these ice ridges are interpreted as a god visiting his goddess wife. Statement 3 is INCORRECT: The phenomenon has not consistently occurred every winter since 1443. It has become increasingly rare, and has not appeared since 2018 due to rising temperatures.

2. Which of the following factors is primarily responsible for the decreasing occurrence of the 'God's Crossing' phenomenon on Lake Suwa?

A.Increased volcanic activity in the region
B.Rising temperatures due to climate change
C.Changes in the lake's water composition
D.Deforestation around the lake

Show Answer

Answer: B

The primary reason for the decreasing occurrence of the 'God's Crossing' phenomenon is rising temperatures due to climate change. The lake requires several days below minus 10°C to freeze entirely, and warmer temperatures have prevented this from happening consistently.

3. Consider the following statements regarding Shintoism: 1. Shintoism is an indigenous religion of Japan that emphasizes the connection between humans and nature. 2. Shinto shrines are dedicated to spirits or deities called 'kami'. 3. Shintoism has a strict set of moral codes and scriptures similar to other major religions. Which of the statements given above is/are correct?

A.1 and 2 only
B.2 and 3 only
C.1 and 3 only
D.1, 2 and 3

Show Answer

Answer: A

Statement 1 is CORRECT: Shintoism is indeed an indigenous religion of Japan that emphasizes the connection between humans and nature. Statement 2 is CORRECT: Shinto shrines are dedicated to spirits or deities called 'kami'. Statement 3 is INCORRECT: Shintoism does not have a strict set of moral codes and scriptures in the same way as some other major religions. It is more focused on rituals and practices related to nature and ancestor veneration.