In this July 14, 2017, photo, elementary school students participate in an evacuation drill in Takaoka, Toyama prefecture, northwest of Tokyo, following repeated missile launches by North Korea. Cabinet Secretariat in charge of crisis management said Thursday, June 21, 2018, Japan plans to suspend civilian evacuation drills planned for the rest of the year amid easing tension following the U.S.-North Korea summit. (Kyodo News via AP)

In this July 14, 2017, photo, elementary school students participate in an evacuation drill in Takaoka, Toyama prefecture, northwest of Tokyo, following repeated missile launches by North Korea. Cabinet Secretariat in charge of crisis management said Thursday, June 21, 2018, Japan plans to suspend civilian evacuation drills planned for the rest of the year amid easing tension following the U.S.-North Korea summit. (Kyodo News via AP)

TOKYO (AP) — Japan plans to suspend the civilian evacuation drills it started last year while North Korea was repeatedly test-firing missiles near and over Japanese islands, officials said Thursday, citing diplomatic overtures from Pyongyang.

Nine drills to prepare residents in Japan for possible missile attacks were to be held later this year.

The Cabinet Secretariat in charge of crisis management said the official announcement of the suspension was expected next week and that recent diplomatic developments meant the prospect of strikes from North Korean missiles has subsided for now.

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North Korean leader Kim Jong Un promised at his summit with President Donald Trump to work toward a denuclearized Korean Peninsula. Washington has also announced that it will suspend its joint military exercises with South Korea planned for the summer.

The planned suspension surfaced Thursday after officials in Tochigi prefecture confirmed a drill there next Tuesday had been called off at the government’s request. Missile drill plans in eight other prefectures, including Kagawa and Tokushima in southwestern Japan, as well as Niigata, Toyama and Ishikawa in the north, were also expected to be put on hold.

The Cabinet Secretariat stressed that the drills are suspended only as long as the tensions remain reduced. The official announcement was delayed as authorities needed more time to gain understanding from some local governments that remained wary of missile threats, officials said.

Chief Cabinet Secretary Yoshihide Suga last week told reporters that the Trump-Kim summit has significantly relieved Japan’s security environment.

“Unlike last year when missiles were repeatedly test-fired, we no longer face a situation in which missiles may come flying any minute,” Suga told reporters Thursday. “The (central) government cannot unilaterally decide, as some municipalities still want to hold the drills.”

The government still plans to go ahead with a plan to install land-based Aegis Ashore missile interceptors. Prime Minister Shinzo Abe said North Korea still possesses hundreds of ballistic missiles, which have not been dismantled.

Japan’s government started missile-specific evacuation drills last March in addition to usual earthquake and other drills, and has since conducted them in more than 20 towns around the country, including Tokyo.

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In a typical drill, about 300 town residents and schoolchildren rush to school buildings to seek shelter after sirens from loudspeakers warn them of a possible missile flight and debris falling on them. They are advised to put their faces down and protect their heads.

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