Manned Space Exploration: Demonstrate the Presence of Japanese Technology

Published in Sankei Shimbun
(Japan) on 17 April 2026
by (link to originallink to original)
Translated from by Dorothy Phoenix. Edited by Michelle Bisson.
The U.S. successfully completed a manned flight around the moon, making significant progress for humankind toward a lunar landing for the first time in about half a century. It is time for Japan, which participated in the project, to firmly reinforce its strategy.

The NASA spaceship Orion finished its moon-orbiting trip of about 10 days and returned safely, marking a splendidly successful first manned trip of the lunar exploration Artemis II program, spearheaded by the U.S.

It is significantly meaningful that after two years, the path to a lunar landing has been opened for the first time since the Apollo project. We hope that the remaining issues, such as the development of a landing module, will be overcome, and that steps toward returning to the moon's surface will advance.

However, there are also concerns. The project details and timing have been repeatedly revised, which has impacted international cooperation with participating countries such as Japan.

It was expected that, for the first time, a Japanese person would land on the moon in the second half of the 2020s, but due to program delays, the timeline has become uncertain. The timing of a lunar landing is a matter of great interest to citizens, and it also impacts astronaut training programs. We would like NASA to clarify the schedule.

The impact of canceling construction plans for a base called “Gateway,” a manned base circling the moon, is also grave. It was to be a core facility as part of the Artemis program, but U.S. competition with China led to a policy change that prioritized constructing lunar surface bases.

Japan was to be responsible for developing the life support system necessary to inhabit the Gateway, and for furnishing supplies, and Japanese people were also expected to stay there. A drastic strategy reassessment is inevitable.

The Artemis program requires lots of money and high technology. The U.S. should keep in mind that international cooperation is essential and emphasize coordination with participating countries. Japan is one of the nations that declared its participation at the project's inception and established a path to international cooperation, so it should have strengthened its voice and influence.

Toward this end, Japan should polish up its unique technology. The lunar water resource probe that the Japan Aerospace Exploration Agency developed, and the lunar rover that it is developing jointly with Toyota Motor Corporation, are critical technologies for sustained activity on the moon's surface. We hope that there will be solidly successful results that will boost Japan's presence.

Without clear international rules for using the lunar surface's resources, there is concern about a first-come, first-served competitive struggle. We want Japan to take a proactive role in devising rules.

The U.S. has declared that it will invest roughly $25 billion over the next seven years to build a lunar base, but Japan has not indicated any cost prediction for lunar exploration. The Japanese government should explain to its citizens concrete plans for the future that include costs.


<主張>有人月探査 日本の技術で存在感示せ

米国の有人月周回飛行が成功し、人類の約半世紀ぶりの月面着陸へ大きく前進した。計画に参加する日本は戦略をしっかり固め直すときである。

米航空宇宙局(NASA)の宇宙船オリオンは約10日間の月周回飛行を終えて無事帰還し、米国主導の月探査「アルテミス計画」の最初の有人飛行を見事に成し遂げた。

アポロ計画以来となる2年後の月面着陸に道を開いた意味は大きい。着陸船の開発など残る課題を乗り越え、月面に再び一歩を踏み出してほしい。

ただ、懸念もある。計画の内容や時期がたびたび変更され、日本など参加各国との国際協力に影響が出ていることだ。

日本人の最初の着陸時期は2020年代後半が見込まれていたが、計画の遅れで不透明になった。着陸時期は国民の大きな関心事であり、宇宙飛行士の養成計画も左右する。NASAは予定を明示してもらいたい。

月を周回する有人基地「ゲートウェイ」の建設計画が凍結された影響は深刻だ。アルテミス計画の中核施設だったが、米国は中国と競争している月面基地建設を優先し方針転換した。

日本はゲートウェイでの居住に必要な生命維持装置の開発や物資補給を担当し、日本人の滞在も見込んでいた。戦略の大幅な見直しは避けられない。

アルテミス計画は多くの費用と先端技術が必要だ。国際協力が不可欠なことを米国は肝に銘じ、参加国との協調を重視すべきである。日本は最初に参加を表明し国際協力の道筋をつけた国の一つであり、もっと発言力を強めていいはずだ。

そのためには独自の技術を磨き上げる必要がある。宇宙航空研究開発機構(JAXA)が開発する月の水資源探査機や、トヨタ自動車と共同開発中の月面探査車は、持続的な月面活動に欠かせない重要技術だ。確実に成果を挙げ日本の存在感を高めたい。


月面の資源利用は明確な国際ルールがなく、早い者勝ちの争奪戦になると懸念されている。日本はルール作りでも積極的に役割を果たしてほしい。

米国は今後7年間で月面基地建設に約3兆円を投じると表明したが、日本は月探査の費用の見通しを示していない。政府は費用を含む今後の具体的な計画を国民に説明すべきである。
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