JAMSTEC Ocean-bottom Seismology Database (J-SEIS) allows researchers to download event data of DONET1 and continuous data of Long-term borehole Monitoring system.

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site policy
The site policy of this sysytem is based on “JAMSTEC site policy”.

User Registration
This system requaire user registration for data download.

[Expiration Date of User Account] : End of the fiscal year

About Data

Data Policy
The data policy of this sysytem is based on “JAMSTEC Data policy”.
Except where otherwise specified, all documents, images, and any other data provided from JAMSTEC’s servers remain under the copyright of JAMSTEC. All and any content of documents provided from JAMSTEC’s servers is subject to change or cancellation without prior notice.
JAMSTEC accepts no responsibility or liability in relation to damages resulting from the content of these documents, nor in relation to damages resulting from changes and so forth to the content of these documents.

Privacy Policy

According to “JAMSTEC privacy policy”, We properly protects collected personal information which can be used to identify a person. We will clearly indicate the purposes of use when acquiring personal information and will not use it for any other purpose.

[Main purposes of Use]

1.To communicate an answer, replies and confirmations to the users of the service provided by this application.

2.To management user account, analyze network traffic for maintain system and keep secure network.


If you publish a paper in a journal or make a presentation at an academic conference using downloaded data, please let us know the information such as offprint or URL of abstract, etc.

3173-25 Showa-machi, Kanazawa-ku Yokomaha Kanagawa 236-0001 Japan
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Center for Earth Information Science and Technology (CEIST)
J-SEIS System Administrator
E-mail: join-contact @

[Reference: DONET Data]

Y. Kaneda, K. Kawaguchi, E. Araki, H. Matsumoto, T. Nakamura, S. Kamiya, K. Ariyoshi, T. Hori, T. Baba N. Takahashi, Development and application of an advanced ocean floor network system for megathrust earthquakes and tsunamis, Seafloor Observatories, P. Favali et al., Springer Praxis Books, doi 10.1007/978-3-642-11374-1_25, pp. 643-662, 2015.
Kawaguchi, K., S. kaneko, T. Nishida and T. Komine, Construction of the DONET real-time seafloor observatory for earthquakes and tsunami monitoring, Seafloor Observatories, P. Favali et al., Springer Praxis Books, doi 10.1007/978-3-642-11374-1_10, pp. 211-228, 2015.


If you have any questions, please contact us by the contact form.