东京 —— 据《日经新闻》获悉，日本政府正考虑在即将进行的定期防卫战略更新中，启动关于收购核动力潜艇可行性的调查。
TOKYO -- The Japanese government is considering starting an investigation into whether to acquire nuclear-powered submarines as part of the upcoming regular update to its defense strategy, Nikkei has learned.
日本预计将于今年晚些时候完成对《国家安全保障战略》及其他两份安全相关文件的修订。有提议建议在文件中加入关于“调查”和“研究”日本是否应拥有核潜艇的表述。
Japan is due to finalize revisions to the National Security Strategy and two other security-related documents later this year. A proposal has been floated to include language about "investigating" and "researching" whether Japan should have nuclear submarines.
一位接近政府的消息人士表示：“如果不写[核潜艇]相关内容，就意味着我们不会推进此事；但如果写上调查或研究，我们就可以在论证可行性的同时，花更多时间得出结论。”
"If we didn't write anything [about nuclear submarines], it would mean we won't go forward with it, but if we write about investigation or research, we can take more time to reach a conclusion while determining the feasibility," a source close to the government said.
核潜艇能够在长距离上长时间作业。拥有它们将拓宽日本与美军的合作。
Nuclear submarines can operate for extended periods over long distances. Possessing them would broaden Japan's collaboration with the U.S. military.
但在获取核潜艇方面，日本将面临诸多挑战。这些不仅包括现行法律将核能利用限定在和平用途，还包括运营舰艇的相关成本。
But Japan would face many challenges in acquiring nuclear submarines. These include not only current laws limiting nuclear energy to peaceful uses, but also the costs associated with operating the vessels.
日本首相高市早苗周三在国会表示，她将就包括引进核潜艇在内的海上航道防卫问题，“深化具体而现实的考量”。
Japanese Prime Minister Sanae Takaichi said in parliament on Wednesday that she would "deepen concrete and realistic considerations" regarding the defense of sea lanes, including the introduction of nuclear submarines.
防卫大臣小泉进次郎周五对记者表示，他认为“国民理解有必要进行讨论”核潜艇问题。
Defense Minister Shinjiro Koizumi told reporters Friday that he believes "the public understands the need for a discussion" on nuclear submarines.
小泉说，这些舰艇“将使我们能够在确保船员安全水平更高的前提下，开展必要的活动”。
The vessels "will enable us to engage in necessary activities while ensuring the safety of the crew at a higher level," Koizumi said.
这三份安全文件还包括《国家防卫战略》和《防卫力整备计划》，上次更新是在2022年。目前没有任何一份文件提及核潜艇。
The three security documents, which also include the National Defense Strategy and the Defense Buildup Program, were last updated in 2022. None currently mentions nuclear submarines.
防卫力整备计划指出，防卫省将“开发并采购可装备于潜艇的垂直导弹发射系统（VLS）”。鉴于核潜艇的速度和灵活性，有人认为此类舰艇最适合装备此类系统。
The Defense Buildup Program states that the Ministry of Defense will "develop and procure vertical missile launch system (VLS) that can be equipped on submarines." Because of the speed and flexibility of nuclear submarines , some have argued that such vessels are best suited for such systems.
负责修订三份文件的政府专家小组迄今已举行四次会议。虽然有成员主张引进核潜艇，但也有成员态度不那么积极。预计专家小组的建议不会明确关于核潜艇的政策方向。一位专家表示：“我认为措辞将不会限制政府的决策。”
The government's expert panel that is working on revising the three documents has held four meetings to date. While there are members who favor acquiring nuclear submarines, there are others who are less willing. The expert panel's recommendations are not expected to specify a policy direction regarding nuclear submarines. "I believe the wording will be such that it won't restrict the government's decision," an expert said.
总部位于华盛顿的智库遗产基金会高级研究员布伦特·萨德勒在2025年12月的一篇评论文章中撰文探讨了从日本运作核潜艇的问题。
Brent Sadler, a senior research fellow at the Washington-based Heritage Foundation think tank, wrote about operating nuclear submarines from Japan in a December 2025 commentary.
根据该评论文章，如果以横须贺基地为母港，一艘核潜艇可在南海作战79天。这将是柴油动力常规潜艇的4.6倍。在菲律宾海和台湾海峡，分别为常规潜艇的2.4倍和2.5倍。
If homeported at the base in Yokosuka, a nuclear submarine could operate in the South China Sea for 79 days, according to the commentary. This would be 4.6 times as long as a diesel-powered conventional sub. In the Philippine Sea and the Taiwan Strait, it would be 2.4 times and 2.5 times as long.
在因中国和俄罗斯的军事压力而紧张的安全环境下，拥有关键海上航道的国家正考虑引进核潜艇。澳大利亚旨在通过与英国、美国组成的三方“奥库斯”（AUKUS）安全伙伴关系建立核潜艇舰队。最终，澳大利亚还寻求在国内建造核潜艇。
In a security environment strained by military pressure from China and Russia, countries with key sea lanes are considering acquiring nuclear submarines. Australia aims to form a fleet of nuclear submarines through the three-way AUKUS security partnership with the U.K. and the U.S. Eventually, Australia looks to build nuclear submarines domestically as well.
此外，韩国政府已与特朗普政府就该亚洲国家引进核潜艇达成协议。
Elsewhere, the South Korean government has reached an agreement with the Trump administration over the Asian country acquiring nuclear submarines.
除了法律和法规方面的挑战，日本运作核潜艇还面临巨大的成本障碍。在美国，建造一艘核潜艇的成本估计超过40亿美元。
Apart from the legal and regulatory challenges, Japan faces significant cost hurdles in operating nuclear submarines. In the U.S., building a unit is estimated at more than $4 billion.
在日本建造一艘核潜艇的成本估计将超过1万亿日元（约合62.9亿美元）。海上自卫队最先进的潜艇每艘造价约为700亿日元。
Constructing a nuclear submarine in Japan is estimated to cost more than 1 trillion yen ($6.29 billion). The Maritime Self-Defense Force's most advanced subs cost around 70 billion yen each.
核潜艇的建造需要先进技术，且在执行任务时可长时间潜航。自卫队面临所需人员严重短缺的问题。
Nuclear submarines require advanced technology to build and can spend long periods underwater when in operation. The SDF faces a serious shortage of the needed personnel.
执政党自由民主党安全保障调查会的一位高级官员对获取核潜艇持谨慎态度。该官员援引了高昂成本和难以获得国际接受这两大难题。该官员表示：“调查会几无意愿接受获取核潜艇的主张。”
A senior official in the ruling Liberal Democratic Party's Research Commission on Security expressed caution on acquiring nuclear submarines. The official cited the high costs and the difficulty in gaining international acceptance. "There is little inclination for the research commission to accept the argument for the acquisition" of nuclear submarines, the official said.
自民党的联合伙伴日本维新会于6月提出，日本应“尽快”获取核潜艇。而在大致同一时期发布的另一份提案中，自民党未提及此类舰艇。
The Japan Innovation Party, the LDP's coalition partner, proposed in June that the country should acquire nuclear submarines "promptly." In another proposal released around the same time, the LDP did not mention the vessels.