Earthquake Resistant Property
Japan Property is built to withstand earthquakes
Here is information about Earthquake resistance of buildings in Japan and risks of earthquake depending on the area.
In Japan, Building Standard Act has been strictly reviewed every time we experienced a large earthquake.
All buildings are strictly required to have an earthquake resistance structure. Without rigorous compliance to
earthquake proof standard set by a low, one can never get an approval of construction of a building from
a public administration office in Japan. It is said that the collapse ratio of the building as a result
of a powerful earthquake is extremely low in Japan compared to any other countries.
Transition of building regulations and earthquake resistance standard by generations
--Kyutaishin-- (Previous earthquake regulations)
1st generation – buildings before 1971
2nd generation – buildings after 1971 and prior to 1981
--Shintaishin-- (Revised earthquake regulations)
3rd generation – buildings after 1981
4th generation – buildings after 2000 (As to wooden structures)
Most of the buildings that collapsed in the Hanshin-Awaji earthquake in 1995 were built before the New Anti-Seismic Design Standard came in effect. As explained here, the standard of earthquake resistance has been tightened every time the law was revised.
Level of earthquake resistance by structure of building
Here are the different type`s of structure categories depending on what was used and how the property was built.
Risk of earthquake depending on the area in Tokyo
cf. Bureau of Urban Development Tokyo Metropolitan Government
Risk of disasters differs depending on many different factors such as ground, shape of the land, density of buildings, etc.
In Tokyo, the areas with higher risk of building collapses can be found on the ground that is categorized as alluvial plain or lowland valley such as alluvial fan, natural levee zone or delta. Furthermore, it is said that so-called local town areas along Arakawa River and Sumidagawa River where old wooden houses and light steel structure buildings gather densely have higher risk of fire. More precisely, southern Adachi ward, Arakawa ward, Eastern Taito ward, Western Katsushika ward, Sumida ward and Northern Koto ward areas are considered more dangerous due to the reason described above.
The areas such as Chiyoda ward, Minato ward and Shibuya ward where many foreign companies gather and many foreign expats reside are considered as relatively safe areas.
Since Japan has had many earthquakes they set regulations and infuse earthquake
resistant technology into all built property.
One could say that Japan`s property may be the strongest built property in the world.