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20.04.2026

The Day the Sanriku Coast Trembled

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This page is an archive of main headlines from Japan for 20.04.2026.

It displays 80 headlines from many sources chronologically, as they appeared throughout the day, accompanied by AI overviews that were written in real time.

20.04.2026The Day the Sanriku Coast Trembled

Japanese editors began the day reporting on escalating U.S.-Iran tensions, with multiple outlets detailing renewed negotiations and U.S. military actions against Iranian vessels. Throughout the afternoon, coverage shifted dramatically to a magnitude 7.4-7.7 earthquake off the Sanriku coast, with tsunami warnings issued for Iwate Prefecture and central Pacific coastal areas of Hokkaido. By evening, editors reported the downgrading of tsunami warnings to advisories and the issuance of 'Hokkaido-Sanriku Offshore Subsequent Earthquake Attention Information,' warning of potential M8+ quakes within a week across 182 municipalities. Simultaneously, coverage continued on domestic political developments, including public opinion surveys on the Takai cabinet and the arrest of a man with a knife at the Diet building.

20.04.2026
09:16
■Aストーリーズ iPS細胞20年「夢の再生医療」の現実(1) iPS細胞とのちに名付けられる細胞の作製成功が初めて世に伝わった舞台は、カナダのリゾート、ウィスラーだった。 「キーストンシンポジア」。生命科学の一流研究者が一堂に集い、最先端…
09:16
09:16
Kyodo News

Bear lurks in residential area in northeastern Japan for hours, then killed

A bear about 1.
09:16
09:59
Kyodo News

N. Korea says it tested improved ballistic missiles with cluster munitions

North Korea said Monday it test-fired improved ballistic missiles carrying cluster warheads the previous day, with the country's leader Kim Jong Un supervising the launches.
09:59
10:12
10:59
日の丸半導体はいかに負け、勝ったのか。電機大手の半導体事業を統合したエルピーダメモリは国に救済された末、2012年に経営破綻した。一方で同じ成り立ちのルネサスエレクトロニクスは官民ファンド傘下で復活した。そして現在、国が後ろ盾となり半導体新興のラピダスが先端品量産に挑む。苦闘の秘話から未来への教訓を探す。 「産業史秘録」は歴史的な産業事件や勝負の分かれ目となった出来事を振り返り、今につながる教訓や…
10:59

11:08Kim's Cluster Missile Test

Japanese editors are reporting on North Korea's ballistic missile test with cluster munitions, with multiple outlets detailing the launch supervised by Kim Jong Un and its implications for regional security (Yahoo News Japan, Kyodo News English). Simultaneously, coverage continues on domestic political developments, including a knife-wielding arrest at the Diet building and political debates about social change (TBS News, Sankei Shimbun).

12:28The Knife at the Diet

Japanese editors are reporting on the arrest of a man with a knife at the Diet building, with multiple outlets detailing the incident at the Upper House members' office building where no injuries occurred (TBS News, Sankei Shimbun, Yomiuri Shimbun). Simultaneously, coverage continues on the Kyoto child murder investigation, focusing on the suspect's confession about killing his son after taking him to school (Sankei Shimbun, Mainichi Shimbun).
13:16
核兵器を「持たず、作らず、持ち込ませず」という非核三原則について、朝日新聞社の全国世論調査(郵送)でどうすべきか聞いたところ、「維持すべきだ」が75%で、「見直すべきだ」の21%を上回った。同じ質問をした2013、14、22年の郵送調査と同…
13:16
14:02

14:18The Father's Premonition Call

Japanese editors are reporting on the arrest of a father in the Kyoto child murder case, with multiple outlets detailing new information about phone calls made before the child was reported missing (TBS News, Sankei Shimbun). Simultaneously, coverage continues on domestic political developments, including public opinion surveys on the Takai cabinet and non-nuclear principles (Sankei Shimbun, Asahi Shimbun).
15:03
Kyodo News

Over 200 Japanese firms paid ransomware attackers, 60% fail to recover data

At least 222 Japanese companies have paid ransomware attackers in the past, yet about 60 percent of them still failed to recover their data, according to a recent survey.
15:03
16:16

16:18Iran's Negotiation Gambit

Japanese editors are reporting on escalating U.S.-Iran tensions, with multiple outlets detailing renewed negotiations and U.S. military actions against Iranian vessels (Yahoo News Japan, NHK News, Nikkei Asia). Simultaneously, coverage continues on domestic economic issues, including record-high Tokyo condominium prices and the decline of Japan's semiconductor industry (Sankei Shimbun, Mainichi Shimbun, Nikkei Shimbun).
16:20
人気グループ「Snow Man」の公演チケットが転売サイト「チケット流通センター」に出品された問題で、東京地裁が出品者の情報開示命令を認める判決を言い渡した。判決は3月18日付。グループの所属事務所「STARTO ENTERTAINMENT…
16:20

17:12The Sanriku Coast Trembles

Japanese editors are reporting on a major earthquake in northeastern Japan, with multiple outlets detailing a magnitude 7.4 quake that struck off the Sanriku coast, generating tsunami warnings for Iwate Prefecture and central Pacific coastal areas of Hokkaido (Hokkaido Shimbun, TBS News, Sankei Shimbun, Yomiuri Shimbun, Mainichi Shimbun, NHK News, Yahoo News Japan, Asahi Shimbun, Chunichi Shimbun).
17:16
17:18
20日午後4時53分ごろ、三陸沖を震源とする地震があり、最大震度5強を観測した。北海道と東北の太平洋側に津波警報と注意報も発表された。 気象庁によると、震源の深さは約10キロ、地震の規模を示すマグニチュードは7.4と推定される。この地震で緊…
17:18
17:26
17:26
Kyodo News

M7.4 quake hits northeast, northern Japan

A powerful quake with a preliminary magnitude of 7.
17:26

17:27The Sanriku Coast Trembles Again

Japanese editors are reporting on a magnitude 7.4 earthquake off the Sanriku coast, with tsunami warnings issued for Iwate Prefecture and central Pacific coastal areas of Hokkaido (Hokkaido Shimbun, TBS News, Sankei Shimbun, Yomiuri Shimbun, Mainichi Shimbun, NHK News, Yahoo News Japan, Asahi Shimbun, Chunichi Shimbun, Nikkei Shimbun, Kyodo News English).
17:34
Kyodo News

M7.5 jolts northeastern Japan, tsunami warning issued

A powerful quake with a preliminary magnitude of 7.
17:34
17:34
17:40
20日午後4時53分ごろ、三陸沖を震源とする地震があり、最大震度5強を観測した。北海道と東北の太平洋側に津波警報と注意報も発表された。予想される津波の高さは北海道太平洋沿岸中部、青森県、岩手県が最大3メートル、北海道太平洋沿岸東部と西部、宮…
17:40

17:50Three-Meter Waves Approach Hokkaido

Japanese editors are reporting on tsunami warnings and evacuations following a magnitude 7.4 earthquake off the Sanriku coast, with multiple outlets detailing 3-meter wave predictions for Hokkaido and Tohoku, observed waves in Iwate, and immediate evacuation orders (Hokkaido Shimbun, TBS News, Sankei Shimbun, Yomiuri Shimbun, Mainichi Shimbun, NHK News, Yahoo News Japan, Asahi Shimbun, Chunichi Shimbun, Nikkei Shimbun, Kyodo News English).
18:16
18:18
18:34

18:35Kuji Port's Eighty-Centimeter Wave

Japanese editors are reporting on tsunami warnings and evacuations following a magnitude 7.4-7.5 earthquake off the Sanriku coast, with multiple outlets detailing 3-meter wave predictions for Hokkaido and Tohoku, observed 80cm waves in Iwate's Kuji Port, and immediate evacuation orders affecting approximately 40,000 people in Hokkaido (Hokkaido Shimbun, TBS News, Sankei Shimbun, Yomiuri Shimbun, Mainichi Shimbun, NHK News, Yahoo News Japan, Asahi Shimbun, Chunichi Shimbun, Nikkei Shimbun, Kyodo News English).
19:16
20日午後4時52分ごろ、三陸沖を震源とする地震があり、最大震度5強を観測した。北海道と東北の太平洋側に津波警報と注意報も発表された。予想される津波の高さは北海道太平洋沿岸中部、青森県太平洋沿岸、岩手県が最大3メートル、北海道太平洋沿岸東部…
19:16
19:34
19:34
青森県で最大震度5強を観測した地震を受け、気象庁と内閣府は20日、北海道沖から三陸沖にかけて巨大地震が発生する可能性が平常時よりも高まったとして「北海道・三陸沖後発地震注意情報」を発表した。 注意を呼びかける対象地域は北海道、青森、岩手、宮城、福島、茨城、千葉の182市町村。 事前の避難は求めず、今後1週間、避難経路の確認や家具の固定など地震の備えへの再確認を呼びかける。注意情報の発表は2025…
19:34

19:36The Subsequent Quake Warning

Japanese editors are reporting on the issuance of a 'Hokkaido-Sanriku Offshore Subsequent Earthquake Attention Information' following the magnitude 7.5 earthquake, with multiple outlets detailing the warning for a potential major quake within a week across 182 municipalities and continued tsunami alerts for Hokkaido and Tohoku (Hokkaido Shimbun, Sankei Shimbun, Yomiuri Shimbun, Nikkei Shimbun, NHK News, Asahi Shimbun, Chunichi Shimbun, TBS News, Mainichi Shimbun, Yahoo News Japan, Kyodo News English).
20:16
20日午後4時52分ごろ、三陸沖を震源とする地震があり、最大震度5強を観測した。北海道と東北の太平洋側に津波警報と注意報も発表され、岩手県の久慈港で80センチ、北海道の浦河、青森県の八戸港、岩手県の宮古で40センチ、宮城県の仙台港や福島県の…
20:16
20:25

20:26The Warning Downgrade

Japanese editors are reporting on the downgrading of tsunami warnings to advisories and the continued evacuation orders following the magnitude 7.5-7.7 earthquake off the Sanriku coast, with multiple outlets detailing the shift from alerts to warnings for Hokkaido, Aomori, and Iwate, while maintaining coverage of the 'Subsequent Earthquake Attention Information' for 182 municipalities across seven prefectures (Hokkaido Shimbun, NHK News, Yahoo News Japan, Asahi Shimbun, Chunichi Shimbun, TBS News, Kyodo News English, Mainichi Shimbun, Sankei Shimbun, Yomiuri Shimbun, Nikkei Shimbun).
21:02
Kyodo News

M7.7 jolts northeastern Japan, tsunami advisories in effect

A powerful quake with a magnitude of 7.
21:02

21:40The Warning Downgrade and Evacuation Orders

Japanese editors are reporting on the continued downgrading of tsunami warnings to advisories and the ongoing evacuation of approximately 44,000 people in Hokkaido following the magnitude 7.5-7.7 earthquake off the Sanriku coast, with multiple outlets detailing the shift from alerts to warnings for Hokkaido, Aomori, and Iwate, while maintaining coverage of the 'Subsequent Earthquake Attention Information' for 182 municipalities across seven prefectures (Hokkaido Shimbun, NHK News, Yahoo News Japan, Asahi Shimbun, Chunichi Shimbun, TBS News, Kyodo News English, Mainichi Shimbun, Sankei Shimbun, Yomiuri Shimbun, Nikkei Shimbun).

23:18The Lifted Evacuation and the Looming Quake

Japanese editors are reporting on the lifting of all evacuation orders in Hokkaido and the continued tsunami advisories following the magnitude 7.7 earthquake off the Sanriku coast, with multiple outlets detailing the 'Subsequent Earthquake Attention Information' warning of potential M8+ quakes within a week across seven prefectures, while noting specific impacts like an 80-year-old woman seriously injured in Urakawa and evacuees stranded in Tokyo skyscraper elevators (Hokkaido Shimbun, TBS News, Sankei Shimbun, Yomiuri Shimbun, Nikkei Shimbun, Mainichi Shimbun, NHK News, Yahoo News Japan, Chunichi Shimbun, Asahi Shimbun, Kyodo News English).
23:45
20日午後4時52分ごろ、三陸沖を震源とする地震があり、青森県階上(はしかみ)町で最大震度5強を観測した。北海道と東北の主に太平洋側に津波警報と注意報が発表され、岩手県の久慈港で80センチの津波を観測した。気象庁と内閣府は同日夜、巨大地震が…
23:45