This app is a viewer of flood hazard maps in Kanto, Japan which includes Ibaraki, Tochigi, Gumma, Saitama, Chiba, Tokyo and Kanagawa prefecture. The app has all shelter information in Japan, and floods in Kanto. Therefore, it can search the nearest shelter and flood level at a current location or an arbitrary one.

■ How to Use

Please do not use this app without a rehearsal in time of a disaster, because the app was created for a desktop exercise. And be sure to check neighboring shelter information by a newsletter in your city.

The app shows an address and a flood level at a center location on a screen map. If the location has some floods, the app searches the maximum flood level in the floods. Tap a shelter icon, it shows a balloon with shelter's name and types. If you tap the balloon then, the app shows detail information of the shelter.

There is a tool bar under the screen. The tool bar has seven functions: Show current location, Change map type, Search shelters, Shelter layer switch, Floods layer switch, Move and App information.

1. Show current location
It moves the center of a screen map to a current location.

2. Change map type
It changes a map type in order of a map, a hybrid, and an aerial photograph.

3. Shelter layer switch
It turns on/off shelter icons. If map scale is less than 1/250000, the icons are hidden automatically.

4. Search shelters
It searches the nearest shelter from a location that is the center of a screen map. And changes to a detail check mode. You can check the nearest shelter and related floods in this mode. Finish is to tap “Done” button.

5. Set target flood
You can choose a displaying flood. If you set the flood, the app shows flood level of only chosen flood.

6. Move
It shows a local governments list in Japan. If you select the government, the center of the screen map moves to a location of the selected government’s office.

7. App Information
It is displayed a legend, notices, data sources and exemption from liability.

■ Data Sources

1. National Land Numerical Information, Flood Zones (2012, MLIT Japan)
2. National Land Numerical Information, Shelters (2012, MLIT Japan)

■ Notes

1. If you have found any English mistakes please let us know.
2. The app doesn’t provide updated information in the case of shelters being retrofitted or relocated.
3. The shortest route given may not always be accurate.
4. Flood zone data is accurate as of 2012.
5. Proper nouns are displayed in Japanese only.

■ Exemption from Liability

ASTI will not be held liable for anything that transpires as a result of using this information. No liability whatever will be accepted for any damage, injury or loss that may be suffered as a result of using the app.

What’s New

Version 2.3.2

- Supported iOS 13.
- Supported Dark Mode.

App Privacy

The developer, Takafumi AMANO, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


Takafumi AMANO
153.9 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Japanese

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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