University of Tokyo

Survey Number 0589
Survey Title Questionnaire Survey on the 2007 Niigata Chuetsu Offshore Earthquake, 2007
Restriction of Use For detailed information, please refer to 'For Data Users' on the SSJDA website.

- Apply to SSJDA. SSJDA's approval required.
Educational Purpose Available for both research and instructional purposes.
Period of Data Use Permission One year
Access to Datasets Download
SSJDA Data Analysis Not available
Summary The Niigata Chuetsu Offshore Earthquake was a magnitude 6.8 earthquake that occurred at 10:13 am on July 16, 2007 (the Marine Day holiday). Strong seismic intensity 6 tremors from the earthquake were observed in Kashiwazaki-, Nagaoka-, and Kariwamura-cities, resulting in a total of 11 deaths.

The residents of central Kashiwazaki were particularly hard hit by the earthquake. This survey was conducted for the purpose of asking them about their behavior and state of mind as well as their attitudes to earthquakes immediately after the earthquake and to provide their answers as basic materials for future disaster prevention measures. 500 residents were asked detailed questions through face-to-face interviews.

There are four points to this earthquake. The first comprised structures in which casualties were found. Many elderly people were living in old houses and were killed when the structures collapsed. Second, the earthquake that hit Kashiwazaki-Kariwa nuclear power plant was stronger than the range expected, and various problems occurred. Third is the use of Earthquake Early Warning (EEW), which was launched in October 2007 for general public. Fourth is that the area affected by this earthquake was also damaged in the previous Chuetsu earthquake three years ago.

The details of the survey are as follows: state of damage/day of the earthquake/evacuee life/earthquake information/telephone and Internet/earthquake awareness and experience/Kashiwazaki-Kariwa nuclear power plant accident/respondent attributes.
Data Type quantitative research: micro data
Universe Individual men and women aged 20 years and older living in the survey area
Unit of Observation Individual
Sample Size Number of responses: 500 people
Date of Collection 2007-07-28 ~ 2007-08-03
Time Period 2007 ~ 2007
Spatial Unit niigata
Individual men and women aged 20 years and older living in the survey area  
Sampling Procedure Mixed probability and non-probability
Area sampling
*For subjects who had moved to evacuation destinations, the survey was conducted if their locations were known.
Mode of Data Collection Face-to-face interview
Self-administered questionnaire: Paper
Interview method (partially combined with self-administered survey (placement method))
Investigator Survey Research Center Collaborators:Isao Nakamura and Naoya Sekiya (Toyo University), Hiromichi Nakamori (Nihon University), Yuki Shuto (Research Institute for Social Safety)
DOI 10.34500/SSJDA.0589
Sponsors (Funds)
Related Publications (by the Investigator) Please refer to the abstract in Japanese.
Related Publications (based on Secondary Analysis) List of related publications (based on Secondary Analysis)
Documentation [Questionnaire]
Major Survey Items (1) Damage
Degree of damage to residences, damage to houses (buildings), internal home damage, presence of injuries due to earthquake, causes of injuries

(2) About the day of the earthquake
Whereabouts when earthquake occurred, physical state at time of earthquake, behavior during tremors, place respondent spent the night on day of earthquake, problems on day of earthquake, information needs immediately after earthquake, sources of information on day of earthquake

(3) Evacuee life
Problems one week after earthquake, place evacuated to immediately after earthquake, good points of public evacuation centers, inconveniences/points of dissatisfaction with public evacuation centers, experience in evacuation centers

(4) Earthquake information
Media for obtaining disaster information, useful sources of disaster information, evaluation of television/radio broadcasts

(5) Telephone/Internet
Communication means used to attempt contact on day of earthquake, telecommunications companies used, connection of communication means immediately after earthquake, time required to get connections, verifying safety of family and acquaintances, recognition/use/usefulness of safety confirmation services, whether or not respondent browsed any web pages conveying disaster information, browsed web pages, usefulness of web pages

(6) Earthquake awareness and experience
Predictions of major earthquake prior to earthquake, predictions of future major earthquakes, awareness of degree of damage of this earthquake, awareness of safety of area of residence prior to earthquake, awareness of safety of area of residence after earthquake, local dangers, whether respondent has secured furniture in preparation for the earthquake, measures prior to earthquake, measures taken as a result of this earthquake, thoroughness of earthquake preparations, intention to prepare for future disasters, experience with the 2004 “Niigata-Chuetsu earthquake,” awareness of Earthquake Early Warning (EEW), what could have been done if information was obtained 10 seconds prior to large tremors

(7) Kashiwazaki-Kariwa Nuclear Power Plant accident
Transformer fire that occurred immediately after earthquake (information sources/how respondent felt about it), radiation leaks in seawater (information sources/how respondent felt about it), unforeseen tremors (information sources/how respondent felt about it), evaluation of mass media broadcasts of Kashiwazaki-Kariwa Nuclear Power Plant accident, problems of the accident, changes in thinking about nuclear power safety, changes in pros and cons of nuclear power, thoughts on Kashiwazaki-Kariwa Nuclear Power Plant accident

(8) Respondent attributes
Gender, age, occupation, family needing assistance at time of evacuation, type of housing, construction period of housing, structure of housing, current housing
Date of Release 2008/10/01
Topics in CESSDA Click here for details

General health and well-being
Information society
Topics in SSJDA Information/Communication/Mass Media
Version 1 : 2008-10-01
Notes for Users Variable and value labels are written in Japanese.