Active fault database of Japan

What's New
2026/06/23
We have revised 22 behavioral segments shown below, and the fault parameters and traces have been changed accordingly. These segments can be viewd at zoom levels up to 16. We have also updated about 800 locality site data for the same region.

202-01 Yamauchi 203-01 Kamine 205-01 Otake 205-02 Kumage 205-03 Tokuyama 209-01 Shibuki 210-01 Kikugawa 212-01 Kokura-higashi 213-01 Fukuchiyama 214-01 Nishiyama 214-02 Kamatoge 215-01 Kego 219-01 Mino 289-01 Koi-Hiroshima-seien 307-01 Funaki 308-01 Takehara 320-01 Itayatoge 333-01 Chojagahara-Yoshii 334-01 Shimogo 336-01 Sakota-Ikumo 341-01 Umi 342-01 Hinatatoge-Okasagitoge
2025/12/19
We have revised Page Flow Diagram.
2025/09/30
We have added about 330 locality data around the behavioral segments in the Osaka area updated on June 17, 2025.
2025/08/05
We have added about 1150 locality data around the behavioral segments updated on February 14, 2025 and other sites all over Japan. (About 250 newly added data and 900 updated data.)
2025/06/17
We have revised 20 behavioral segments shown below. The fault parameters and traces have been changed.These segments can be viewd at zoom levels up to 16.

175-05 Yoshiminedera 176-01 Ujigawa 176-02 Takatsuki 176-03 Baba 176-04 Minoo 176-05 Satsukiyama 176-06 Itami 176-07 Rokkosan 176-10 NIshinomiya 176-11 Kawanishi 177-01 Otokoyama 177-02 Katano 177-03 Ikoma 178-01 Uemachi 178-02 Sennan 178-03 Butsunenjiyama 182-01 Tondabayashi 182-02 Kawachinagano 256-01 Yata 262-01 Uchihata
2025/02/14
We have revised 51 behavioral segments shown below. The fault parameters and traces of 49 behavioral segments have been changed. According to the changes of 128-01 Sanageyama-kita, 128-02 Sanage-Sakaigawa, and 128-04 Obu, we have delated 128-03 Takahama. 073-02 Susugaya has been separated from 073-01 Isehara.

Tohoku
024-01 Hanawa-higashi 025-01 Noshiro 026-01 Ukai 026-02 Hanamaki 026-03 Kitakami-nishi 028-01 Tazawako-toho 029-01 Senya 029-02 Kanazawa 029-03 Omoriyama 030-01 Kawafune 030-02 Warikurayama 031-01 Kitaguchi 032-01 Nakacho 032-02 Toridame
Chubu
116-01 Agi 116-02 Okudaira 116-03 Mitsumoriyama 116-04 Iinuma 116-05 Sogi 124-01 Tegano 124-02 Byobuyama 124-03 Onogawa 128-01 Sanageyama-kita 128-02 Sanage-Sakaigawa [Delated]128-03 Takahama 128-04 Obu 129-01 Yokosuka 129-02 Fukozu 156-01 Kagiya 157-01 Taketoyo 303-01 Kasahara
Kanto
061-01 Tokyowan-hokuen 062-01 Kamogawachikotai-kita 063-01 Kamogawachikotai-minami 065-01 Sekiya 066-01 Takasaki 066-02 Fukaya 066-03 Ayasegawa 066-04 Hirai 068-01 Arakawa 069-01 Ogose 073-01 Isehara [New]073-02 Susugaya 074-01 Kurokura 075-01 Kannawa 075-03 Shibusawa 077-01 Kinugasa 077-02 Kitatake 077-03 Takeyama 273-01 Takahagi 277-01 Minamishitaura 295-01 Tokyowan-hokubu

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Outline

This website contains information of active faults in Japan, sorted by the concept of "behavioral segments" [McCalpin, 1996]. Each fault is subdivided into behavioral segments based on surface trace geometry and rupture history revealed by paleoseismic studies. Faults shown on the index map are linked to a database of behavioral segments, which contains information of geologic and paleoseismic parameters including slip rate, slip per event, recurrence interval, and calculated rupture probability in the future. Behavioral segments can be searched also by name or combination of fault parameters. All those data are compiled from journal articles, theses, and other documents. We are currently developing a revised edition which is based on an improved database system.


Notice

The active fault data displayed on this website cannot be used for commercial purpose. Contact Active Fault Research Center (AFRC) when you wish to reprint or reproduce this database. Proper citation of the source (i.e., AFRC) is required for all other purposes.
AIST does not express any official opinion on the contents of Google Maps™, which are used as a base map for this database.