Explainer: Strike capability, other military options on table after Japan 's Aegis U-Turn
Japan 's decision to scrap two Aegis Ashore ballistic missile defence systems means it must find other ways to defend a 3,000-kilometre archipelago along Asia's eastern edge.
5 Min ReadTOKYO (Reuters) - Japan’s decision to scrap two Aegis Ashore ballistic missile defence systems means it must find other ways to defend a 3,000-kilometre archipelago along Asia’s eastern edge.A facility of Aegis Ashore Missile Defense Test Complex is pictured in Kauai, Hawaii, U.S in this photo taken by Kyodo January 18, 2019. Picture taken on January 18, 2019. Mandatory credit Kyodo/via REUTERS
Some policy makers want Japan to acquire the capability to attack enemy missiles before they are launched.‘IMPOSSIBLE’ PROBLEMIn a surprise decision, defence minister Taro Kono recently halted the 2025 deployment of Aegis Ashore because booster rockets used to accelerate SM-3 Block IIA interceptor missiles might fall on communities in northern Akita and southern Yamaguchi prefectures.
That problem, according to military experts, has been known since Japan picked Aegis Ashore in 2018. The interceptor was developed for use at sea, where debris would fall harmlessly.“From the beginning, the Japanese government’s story was impossible. I was a missile shooter, I knew how difficult it would be to control the fall of burned-out boosters,” former Maritime Self Defense Force admiral Yoji Koda, who commanded Japan’s naval fleet from 2007 to 2008, told Reuters.
The expense of Aegis Ashore project also affected Kono’s decision.Japan’s Aegis Ashore contracts are worth around $1.7 billion, with more than $100 million already spent. Over 30 years the defence ministry estimated the budget at around $4 billion, not including missile tests that sources last year said could cost at least $500 million.
ALTERNATIVESFor now, Japan will rely on destroyers with older Aegis radars that guide less-powerful SM-3 interceptors, which can hit enemy missiles in space and can be upgraded to tackle other threats. Japan also has PAC-3 Patriot missile batteries, which can shoot at plunging warheads in their last seconds before impact.
Japan is increasing the range and accuracy of its Patriots and by next year will have eight Aegis destroyers. Crewing ships with about 300 sailors each, however, strains naval resources as the country struggles to find recruits.“Having two or three Aegis ships in the Sea of Japan is a waste of assets. I think Aegis Ashore is a good option,” said Noboru Yamaguchi, a Sasakawa Peace Foundation adviser and former Ground Self Defense Force general.
Japan could add another layer of defence, such as the U.S. Terminal High Altitude Area Defense (THAAD) missiles, which aims at warheads between the capabilities of SM-3s and Patriots. Their mobile launchers are easier to deploy than fixed Aegis sites, but could still face opposition from residents because several missile batteries, which use powerful radars, would be needed to cover Japan’s big cities.
STRIKE OPTIONJapan’s National Security Council, led by Prime Minister Shinzo Abe, will this summer consider whether to buy weapons for attacking missile sites before a launch.A council made up senior ruling Liberal Democratic Party lawmakers, including four former defence ministers, will also weigh the idea. Itsunori Onodera, who approved the Aegis Ashore purchase when he was defence chief, is leading the discussion.
Such an option is attractive because it is easier to hit missiles sitting on launch pads than to attack them in flight.Onodera argues that attacking missile sites is the modern equivalent of downing enemy bombers, putting it in line with Japan’s war-renouncing constitution, which allows for self defence.
In 2017 Onodera approved the purchase of air-launched cruise missiles with a range of up to 1,000 kilometres that can be fired from F-35 stealth fighters or F-15 attack jets, making them able to strike targets in North Korea from the Sea of Japan.SNAGS
Those cruise missiles are not effective without satellites or other means of providing precise targeting information, and of telling whether an attack is imminent. Japan has launched surveillance satellites on its H-2A rocket, most recently in one in February, but those are not designed for strike-targeting.
If Japan musters a first-strike capability, it could face opposition from China, Russia and even South Korea.That may not stop Japan, but resistance from the United States could. Under their military alliance, Japan provides a defensive shield that protects U.S. forces. Past U.S. administrations have opposed an independent Japanese strike capability.
Constitutional considerations could also curtail the scope of strikes. Japan’s U.S.-authored constitution renounces its right to wage war.Any first-strike doctrine would have to be carefully defined before it is even considered by the NCS, Kono said in Tokyo last month.
($1=107.4500 yen)Reporting by Tim Kelly; Editing by Gerry Doyle Read more: Reuters Top News »
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The building in this picture looks like a smiley marshmallow. And the world will keep quiet and looking?! Not at all... Let the game bigging... Japan is a small country and if it uses missiles whether before or after, it will be destroyed in a moment. The gov planned to deploy Aegis with google map. How can they use any arms accurately? Even SDF doubted the gov's action. Anyway the measures it has to take is disarmament.
Why does the right hand side of this building look like Zippy from Rainbow?
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