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Profile of Stone Peace
contents peacestone
The stones revived as the Stone for Peace are granite stones that were handed over from the Hiroshima streetcar operator and left idle until after any possible residual radioactivity disappeared. After several years, those stones were given a new mission by some 10,000 citizens of Hiroshima who engraved the goddess image and the words eFrom Hiroshimaf on them symbolizing their wish for peace. Therefore, none of them is the same. Their safety has been scientifically proved by a Hiroshima University professor.
Size of Stone for Peace The weight of the Stone is approximately 50 kg.




  Height Width Depth Weight
Stone 48`50cm 48`50cm 30cm 50kg
With the frame 48`50cm 48`50cm 50cm 80`150kg
(The size and weight vary)
Exhibition of Stone for Peace

Where to display the Stone for Peace is decided by the recipient country in consideration of our request, which is to install in a public area. The Stone is sent in a golden frame that can be displayed indoor as it stands. Some countries place the Stone outside as a peace monument by taking the frame off.

Exhibition of Stone for Peace01

The Stone for Peace is packed in
a wooden crate and shipped by air.
(Maputo, Mozambique)

Exhibition of Stone for Peace02

Courtyard of the Presidential Palace
(Luanda, Angola)

Exhibition of Stone for Peace03

Peace Park right in center of Reykjavik
(Reykjavik, Iceland)

Exhibition of Stone for Peace04

Installed in a traditional sanctuary
(Naypyidaw, Myanmar)

Exhibition of Stone for Peace05

In front of the Museum of
Ikuo Hirayama with glass enclosure (Tashkent,

Exhibition of Stone for Peace06

The stone monument
built for the exhibition of the Stone (Koror, Palau)

Exhibition of Stone for Peace07

Outside display on a
stone mounting

Exhibition of Stone for Peace08

Country yard of the Opera
House (Cairo, Egypt)

Exhibition of Stone for Peace09

The garden of the Presidential Palace (Riga, Latvia)

Exhibition of Stone for Peace10

The park dedicated to Chiune Sugihara (Vilnius, Lithuania)


A well-known garden architect designed the location of the Stone (Tallinn, Estonia)


Peace Park of Semey
(Semey, Kazakhstan)


Indoor exhibition of National Museum (Sarajevo, Bosnia)

Stone for Peace: Free of Radioactivity

A professor of Hiroshima University has proved that there is no residual radioactivity harm to human beings left in the Stones. The following is the certificate.

21 September, 1998
To whom it may concern

Certificate of Ratioactivity Inspection

The purpose of this letter is to certify that granite paving stones used for the Hiroshima streetcar at the time of the atomic bomb do not any harmful effect on the human body on the grounds of our measurements.

After 53 years since the atomic bomb, it is hard to detect residual radioactivities caused by the bomb. Today, radioactivities detectable by means of the most advanced radiation detectors currently available are as follows:
1) Long-lived neutron-induced activities in materials above the ground,
2) Radiactive fallout produced by the bomb.
The former includes europium-152 (halflife: 13 years) produced in stones. For the latte, it is known that there was fallout in the downwind area more than 3 km away from the hypocenter, however, there was no fallout observed in the city of Hiroshima. We have conducted gamma-ray measurement on the 27th of April, 1991 in the granite paving stone of streetcar tracks in Hiroshima using a low background germanium semiconductor detector. Europium-152 was detected as 0.34 Bequrel per on kilogram of the stone. This figure indicates that the stone has definitely been exposed to the bomb. The dose rate generated by the amount of europium-152 contained in 1 kilogram of the stone measured 1 meter away was 2.7 x 10-12 roentgen/hour on the 21th of September, 1998. On the other hand, the total dose rate from the natural radioactivities contained in the stone as potassium-40, uranium series and thorium series is estimated as 1.5 x 10-18 roentgen/hour. This means the artificial radioactivities caused by the bomb is less than 1/5,400 of the natural radioactivities.

Therefore, we reach the conclusion that the granite paving stones used for the Hiroshima streetcar do not have any negative influence on the human body.

Professor Dr. Kiyoshi Shizuma
Applied Nuclear Physics
Hiroshima University

Certificate of Ratioactivity Inspection