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Tsunami Warning Transmission System

Last Updated October 1, 2021

Based on the lessons learned from the Great East Japan Earthquake that occurred on March 11, 2011, we have installed a tsunami warning transmission system in the tsunami area that calls for evacuation using outdoor speakers so that citizens can take evacuation actions as soon as possible in the event that a major earthquake is expected to occur in the tsunami area.

Installation location

Tsurumi Ward

  1. Tsurumi Ward General Government Building
  2. Shiota Junior High School
  3. Kansei Junior High School
  4. Shioiri Elementary School
  5. Namamugi Elementary School
  6. Namamugi Kainohama Ryokuchi Park
  7. Municipal Namamugi Housing
  8. Central Wholesale Market Meat Market
  9. Hokubu No.2 Wastewater Treatment Plant
  10. Daikokucho Daiichi Park
  11. Daikoku Wharf T-1 Green Space
  12. Tsurumisuijyou Fire Department
  13. Daikoku Sea Crab Facility

Kanagawa Ward

  1. Iriegawa Park
  2. Irie 2-chome Park
  3. Near Shinkoyasu Station bicycle parking lots
  4. Former Nanashima Town Children's Playground
  5. Urashima Fire Department Branch Office
  6. Near Takaramachi
  7. Izutacho Wharf B Green Area
  8. Kanagawa Ward General Government Building
  9. Kanagawa Wastewater Treatment Plant
  10. Near the Tsuruyacho intersection
  11. Central Wholesale Market

Nishi Ward

  1. Near the exit of Yokohama-sta.-nishiguchi Metropolitan Expressway
  2. Takashima 2-chome East Exit 2nd bicycle parking lots
  3. Near Utsumi Bridge
  4. Near Yokohama Station East Exit Bus Terminal
  5. Near the "Koban" (police box) Sotetsu Exit
  6. Near the Okanocho Intersection
  7. Okano Junior High School
  8. Takashima 1-chome National Highway Side
  9. Near Hiranuma Bridge
  10. Near Asayamabashi Bridge
  11. Rinko Park (Seaside Park)
  12. West Sports Center
  13. Near Hiranuma 1-chome
  14. Hiranuma Sawayaka Park
  15. Hiranuma Elementary School
  16. Nippon-Maru Memorial Park

Naka Ward

  1. Cup Noodle Museum Park
  2. Aka Renga Park (Red Brick Warehouse Park)
  3. Canal Park
  4. Yokohama City Health and Welfare Center
  5. Zonohana Park
  6. Yamashita Park
  7. Yamashita-Futo
  8. Yokohama City Training Center
  9. Naka fire department
  10. Honmoku Futo A jetty
  11. Honmoku Wharf B jetty
  12. Yamashita-Cho Koen
  13. Minato Sogo High School
  14. Yokohama city minato Red Cross Hospital
  15. Honmoku Futo D jetty
  16. Near the bus stop behind the Honmoku Fishery Association
  17. Near Negishi "Koban" (police box)
  18. Honmoku Citizen Park
  19. Minami-Honmoku Futo

Minami Ward

  1. Near Fujimigawa Park
  2. Minamiyoshida Elementary School
  3. Hie Elementary School

Hodogaya Ward

  1. Near Tenno Bridge

Isogo Ward

  1. Negishi Community Care Plaza
  2. Negishi Elementary School
  3. Near the Yahatabashi Intersection
  4. Isogo fire department
  5. Near Shinisogo-cho
  6. Near the Isogo Sea Bowling Facility
  7. Isogo Ward General Government Building
  8. Byobugaura Elementary School
  9. Isogo Sports Center
  10. Sugita Elementary School

Kanazawa Ward

  1. Yokohama Bayside Marina
  2. Southern Yokohama Market
  3. Green area along trunk line No. 1
  4. Namiki Daiichi Elementary School
  5. Kanazawa Factory
  6. Green area along the Nagahama Channel
  7. Seaside promenade
  8. Koshibazaki Green Road
  9. Marine Park
  10. Hakkei Elementary School
  11. Hakkeijima
  12. Kanazawa Elementary School
  13. Yanagimachi Community House
  14. Near the Nojimakoen Station
  15. Near the Nojima Youth Training Center in Yokohama City
  16. Rokuura Junior High School

Mechanism

In response to large tsunami warnings, tsunami warnings, and tsunami warnings issued by the Japan Meteorological Agency, emergency information such as tsunami warnings and evacuation warning will be automatically broadcast from installed outdoor speakers.
The power supply is powered by independent solar power generation and storage batteries.

System image diagram

Tsunami warning transmission system image diagram

Broadcast audio

When a large tsunami warning, tsunami warning, or tsunami warning is announced in the inner bay of Tokyo Bay, this system will broadcast. The large tsunami warning will be broadcast according to the expected height of tsunami.

Large tsunami warning (10m <estimated height of tsunami)

  1. Siren (4 times)
    About 3 seconds (about 2 seconds Aki)
  2. Broadcast text
    "large tsunami warning, large tsunami warning, large tsunami warning, large tsunami warning"
  3. Siren (4 times)
    About 3 seconds (about 2 seconds Aki)
  4. Broadcast text
    "A huge tsunami is coming. A huge tsunami is coming."
  5. Siren (4 times)
    About 3 seconds (about 2 seconds Aki)
  6. Broadcast text
    "Evacuate to a high place. Evacuate to high places."
  7. Siren (4 times)
    About 3 seconds (about 2 seconds Aki)
  8. Broadcast text
    "Tsunami, Tsunami, Tsunami" (1st set: English, 2nd set: Chinese, 3rd set: Korean)
  9. Siren (4 times)
    About 3 seconds (about 2 seconds Aki)
  10. Broadcast text
    "Evacuate to high places." (1st set: English, 2nd set: Chinese, 3rd set: Korean)
  11. Siren (4 times) (only for the third set)
    About 3 seconds (about 2 seconds Aki)

※We will broadcast 3 sets of 1 to 10. In addition, each set will broadcast words that encourage evacuation in different languages (English, Chinese, Korean).
※The 11 sirens will be broadcast only in the third set.
Large tsunami warning sound source (10m <Expected height of tsunami) (Music file (MP3): 7,314KB)

Large tsunami warning (3m <Expected height of tsunami ≤ 10m)

  1. Siren (4 times)
    About 3 seconds (about 2 seconds Aki)
  2. Broadcast text
    "large tsunami warning, large tsunami warning, large tsunami warning, large tsunami warning"
  3. Siren (4 times)
    About 3 seconds (about 2 seconds Aki)
  4. Broadcast text
    "Evacuate to a high place. Evacuate to high places."
  5. Siren (4 times)
    About 3 seconds (about 2 seconds Aki)
  6. Broadcast text
    "Tsunami, Tsunami, Tsunami" (1st set: English, 2nd set: Chinese, 3rd set: Korean)
  7. Siren (4 times)
    About 3 seconds (about 2 seconds Aki)
  8. Broadcast text
    "Evacuate to high places." (1st set: English, 2nd set: Chinese, 3rd set: Korean)
  9. Siren (4 times) (only for the third set)
    About 3 seconds (about 2 seconds Aki)

※We will broadcast 3 sets from 1 to 8. In addition, each set will broadcast words that encourage evacuation in different languages (English, Chinese, Korean).
※The siren of 9 will be broadcast only in the third set.

Large tsunami warning sound source (3m <Expected height of tsunami ≤ 10m) (Music file (MP3): 5,617KB)

Tsunami warning (1m <estimated height of tsunami <3m>)

  1. Siren (2 times)
    Approx. 5 seconds (approx. 6 seconds Aki)
  2. Broadcast text
    "Tsunami Warning, Tsunami Warning, Tsunami Warning, Tsunami Warning"
  3. Siren (2 times)
    Approx. 5 seconds (approx. 6 seconds Aki)
  4. Broadcast text
    "Evacuate to a high place. Evacuate to high places."
  5. Siren (2 times)
    Approx. 5 seconds (approx. 6 seconds Aki)
  6. Broadcast text
    "Tsunami, Tsunami, Tsunami" (1st set: English, 2nd set: Chinese, 3rd set: Korean)
  7. Siren (2 times)
    Approx. 5 seconds (approx. 6 seconds Aki)
  8. Broadcast text
    "Evacuate to high places." (1st set: English, 2nd set: Chinese, 3rd set: Korean)
  9. Siren (twice) sounding (only for the third set)
    Approx. 5 seconds (approx. 6 seconds Aki)

※We will broadcast 3 sets from 1 to 8. In addition, each set will broadcast words that encourage evacuation in different languages (English, Chinese, Korean).
※The siren of 9 will be broadcast only in the third set.
Tsunami warning sound source (1m <Expected height of tsunami ≤ 3m) (Music file (MP3): 5,648KB)

Tsunami warning (0.2m ≤ estimated height of tsunami ≤ 1m)

  1. Siren (2 times)
    Approx. 10 seconds (approx. 2 seconds Aki)
  2. Broadcast text
    "Tsunami Warning, Tsunami Warning, Tsunami Warning, Tsunami Warning"
  3. Siren (2 times)
    Approx. 10 seconds (approx. 2 seconds Aki)
  4. Broadcast text
    "Go away from the sea. Get away from the sea."
  5. Siren (2 times)
    Approx. 10 seconds (approx. 2 seconds Aki) (only for the third set)

※We will broadcast three sets of 1 to 4.
※The siren of 5 will be broadcast only in the third set.
Tsunami warning sound source (0.2m <Expected height of tsunami ≤ 1m) (Music file (MP3): 4,776KB)

Notice

About the nationwide simultaneous information transmission test of the national instantaneous alarm system (J Alert) conducted by the government (notice)

Please refer to the Disaster Prevention Speaker page for information on nationwide simultaneous information transmission tests of the national instantaneous alarm system (J Alert) conducted by the government.

Inquiries to this page

Emergency Response Division, Crisis Management Department, General Affairs Bureau

Telephone: 045-671-2064

Telephone: 045-671-2064

Fax: 045-641-1677

Email address: so-kinkyu@city.yokohama.lg.jp

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Page ID: 181-870-243

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