Preservation Projects

The Atomic Bomb Dome has remained in the condition it was left in after the bombing. There have been no significant structural changes, but as the Dome continued to deteriorate due to wind and rain, the structure was faced with the possibility of collapse. This led to a preservation project conducted in FY1967 to preserve the Dome as it was after the bombing. Four additional preservation projects have been conducted since.

Fundraising campaigns were conducted to raise the construction fees for both projects, gathering a large amount in donations. The remainder of the funds were reserved in the Atomic Bomb Preservation Project Fund and used for the third, fourth, and fifth preservation projects and preservation surveys.

Below is a summary of past construction work.

Preservation Projects

Preservation Project	Period	Basic Aims	Construction Summary
I	April to August 1967	Preserve the building in its existing state, including the parts that had caved in or fallen apart	Seal cracks on the walls Reinforce unstable parts with steel framework Raise walls, pull up girders, pile up collapsed bricks Apply anti-corrosion coating to the original steel frame and new reinforcements Waterproof storehouse roof, reinforce wall tops with mortar
II	October 1989 to March 1990	Prevent the further deterioration of concrete, bricks, and other materials as well as those which were added during the first preservation project	Repair deteriorating concrete Repair brickwork Apply anti-corrosion coating to steel frame Replace corroded parts of the original steel frame Apply water repellant to all wall surfaces
III	October 2002 to March 2003	Prevent further deterioration of the structure caused by rain water	Rain damage prevention (wall tops, windowsills, interior walls inside the dome, former storehouse, and basement) Apply coating to steel reinforcements Preservation measures for the ceiling slabs of the former storehouse
IV	November 2015 to July 2016	Prevent further damage caused by earthquakes	Earthquake damage prevention (Adding steel reinforcements on three walls)
V	June 2020 to April 2021	Prevent further deterioration of the steel components	Repaint steel rafters and steel reinforcements Repair brickwork Repair window frames Repair metal reinforcements

Detailed summaries of preservation work

• Atomic Bomb Dome Preservation Project I
• Atomic Bomb Dome Preservation Project 2.
• Atomic Bomb Dome Preservation Project 3.
• Atomic Bomb Dome Preservation Project 4.

Inquiries regarding this page

Park Development Division, Greenery Promotion Department, Urban Development Bureau
Phone: 082-504-2393 / Fax: 082-504-2391
Mail: [email protected]