I believe everyone who watched this movie was shocked by the ending. At first, I couldn't understand it at all, and I thought it might be lacking explanation. However, as I began to connect the various clues within the movie, I realized that it leads to a compelling interpretation. I believe this movie can be interpreted in various ways, but I'd like to share my interpretation here.
First, I'll start with the conclusion:
"Takumi intended to die together with Hana and incapacitated Takahashi."
In the film, Takumi said "Deer are timid animals, so they never attack people. But a wounded deer might." Considering Takumi as a wounded deer, his sudden act of violence in the final scene makes sense.
So, what does it mean for Takumi to be wounded? Physically, he's healthy, but emotionally, he's deeply wounded by the loss of his wife (likely due to her death). There are photos of his wife in his house, suggesting not much time has passed since her death. Despite appearing to live normally, Takumi frequently forgets to pick up Hana from after-school care and makes other mistakes, indicating his emotional struggle.
The daughter, Hana, is also wounded by her mother's death. Hana doesn't play with other children at all; she walks through nature. While at home, Hana tries to get Takumi's attention but is treated coldly. Hana is not only unable to interact with other children but is also rejected by her father.
One of the reasons Takumi decided on murder-suicide is to relieve himself and his daughter from suffering. The other reason is to restore balance between nature and humans.
The developer planning to build a glamping facility along the deer path may seem like destroyers of nature, but in reality, the local residents, including Takumi, are doing something even more terrifying-they are killing deer with guns. This fact is starkly presented through the image of the wounded deer. Paradoxically, Hana's innocent approach to the deer further emphasizes that both she and Takumi are none other than destroyers of nature.
Therefore, Takumi might have felt that they shouldn't be alive. Takumi said, "Balance is important." A double suicide to save both from suffering might restore a bit of balance between nature and humans.
Takumi's decision to strangle Takahashi is to prevent interference with his intended murder-suicide. There might have been a thought that if the deer attacked Hana, it would be restoration of balance, since humans had shot the deer. Takumi didn't intend to kill Takahashi; he just incapacitated him. This is evident from Takahashi standing up at the end. Of course, there's a possibility Takahashi might die if left out in the cold.
Hana is lying on the ground, bleeding from her nose, likely attacked by the injured deer. From Takumi's action of wiping Hana's nosebleed, it seems that Hana is not dead. If the intention were to imply Hana's death, it would be more natural to have blood flowing from her mouth, suggesting internal organ damage.
Takumi picks up Hana and leaves the scene. Here, Takumi walks in a different direction from the way they came, strongly supporting the interpretation of a murder-suicide.
Lastly, regarding the meaning of the title, the director mentioned in an interview that the audience is prohibited from simply seeing the eruption of violence in the ending as evil because of the title.
The "eruption of violence" likely refers directly to Takumi strangling Takahashi. However, in my interpretation, murder-suicide, namely Takumi killing Hana, is also implied. The anguish we feel from being forbidden to see Takumi's act of killing Hana as evil is, I believe, one of the true meanings behind the title.
If you're interested in a more detailed analysis, please click on the link in my bio.
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