The remains of shoes and the crayon case of Airi Sato, a victim of the March 11, 2011, earthquake and tsunami and the daughter of Mika Sato, are displayed at 3.11 Memorial Hall Minamihama Tsunagukan in Ishinomaki, Miyagi prefecture, Japan, March 1, 2021.

Yoshihito Sasaki, 70, who lost his wife, Mikiko, and his younger son, Jinya, in the March 11, 2011, earthquake and tsunami, pauses at his home in Rikuzentakata, Iwate Prefecture, Japan, February 26, 2021.

Mika Sato, 46, who lost her daughter Airi in the March 11, 2011, earthquake and tsunami, touches the characters spelling "Airi" that are carved on a memorial monument built for Sato's daughter and her kindergarten classmates in Ishinomaki, Miyagi prefecture, Japan, March 1, 2021.

Residents of Hisanohama change Gohei, paper offering to a god in the Shinto ritual, on a torii gate in front of a memorial monument for the victims of the 2011 earthquake and tsunami at Akiba shrine ahead of its ten years anniversary in Iwaki, Japan, March 10, 2021.

Mika Sato, 46, who lost her daughter Airi in the March 11, 2011, earthquake and tsunami, touches a memorial monument built for Airi and her kindergarten classmates in Ishinomaki, Miyagi prefecture, Japan, March 1, 2021.

Yellow handkerchiefs bearing messages supporting people in areas hit by the 2011 earthquake and tsunami are hanged at Iwaki 3.11 Memorial and Revitalisation museum ahead of the ten years anniversary of the disaster in Iwaki, Japan, March 10, 2021.

Mika Sato, 46, who lost her daughter Airi in the March 11, 2011, earthquake and tsunami, reacts as she stands in front of a memorial monument built for Airi and her kindergarten classmates in Ishinomaki, Miyagi prefecture, Japan, March 1, 2021.

A sign board designating a tsunami inundation section is seen in Rikuzentakata, Iwate Prefecture, northern Japan March 1, 2021, ahead of the 10th anniversary of the 2011 earthquake and tsunami disaster.

Mika Sato, 46, who lost her daughter Airi in the March 11, 2011, earthquake and tsunami, walks at a coastal area devastated by the tsunami in Ishinomaki, Miyagi prefecture, Japan, March 1, 2021.

The rising sun and 'Miracle Pine', a tree which is said to symbolise hope and recovery after it survived the 2011 tsunami, are seen next to a seawall in Rikuzentakata, Iwate Prefecture, northern Japan February 27, 2021, ahead of the 10th anniversary of the 2011 earthquake and tsunami disaster.

Local residents push their bicycles up the road next to a big seawall along the coastal area in Otsuchi town, Iwate Prefecture, northern Japan, February 28, 2021, ahead of the 10th anniversary of the 2011 earthquake and tsunami disaster.

A tsunami-devastated apartment building is seen at the coastal area in Rikuzentakata, Iwate Prefecture, northern Japan, March 1, 2021, ahead of the 10th anniversary of the 2011 earthquake and tsunami disaster.

Yoshihito Sasaki, 70, who lost his wife, Mikiko, and his younger son, Jinya, in the March 11, 2011, earthquake and tsunami, walks along the coast near his home in Rikuzentakata, Iwate Prefecture, Japan, February 26, 2021.

A couple walk on Usuiso beach, which was hit by the 2011 earthquake and tsunami, ahead of the ten years anniversary of the disaster in Iwaki, Japan, March 10, 2021.

Yoshihito Sasaki, 70, who lost his wife, Mikiko, and his younger son, Jinya, in the March 11, 2011, earthquake and tsunami, walks along the coast near his home in Rikuzentakata, Iwate Prefecture, Japan, February 26, 2021.

Yoshihito Sasaki, 70, who lost his wife, Mikiko, and his younger son, Jinya, in the March 11, 2011, earthquake and tsunami, looks at photos of his family that were damaged in the disaster and recovered by volunteers at his home in Rikuzentakata, Iwate Prefecture, Japan, February 26, 2021.

A long sea wall is seen at the coastal area devastated by the March 11, 2011, earthquake and tsunami in Ishinimaki, Miyagi Prefecture, northern Japan, March 1, 2021, ahead of the 10th anniversary of the 2011 earthquake and tsunami disaster.

A cafe hit by the 2011 earthquake and tsunami is pictured ahead of the ten years anniversary of the disaster in Iwaki, Japan, March 10, 2021.