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Published online by Cambridge University Press: 07 May 2025
In this recent flare-up of the island dispute after Japan “purchased” three of the Diaoyu/Senkaku Islands, Japan reiterates its position that “the Senkaku Islands are an inherent part of the territory of Japan, in light of historical facts and based upon international law.” This article evaluates Japan's claims as expressed in the “Basic View on the Sovereignty over the Senkaku Islands” published on the website of the Ministry of Foreign Affairs, Japan. These claims are: the Senkaku/Diaoyu island group was terra nullius which Japan occupied by Cabinet Decision in 1895; China did not, per China's contention, cede the islands in the Shimonoseki Treaty; Japan was not required to renounce them as war booty by the San Francisco Peace Treaty; and accordingly Japan's sovereignty over these islands is affirmed under said Treaty. Yet a careful dissection of Japan's claims shows them to have dubious legal standing. Pertinent cases of adjudicated international territorial disputes are examined next to determine whether Japan's claims have stronger support from case law. Although the International Court of Justice has shown effective control to be determinative in a number of its rulings, a close scrutiny of Japan's effective possession/control reveals it to have little resemblance to the effective possession/control in other adjudicated cases. As international law on territorial disputes, in theory and in practice, does not provide a sound basis for its claim of sovereignty over the Diaoyu/Senkaku Islands, Japan will hopefully set aside its putative legal rights and, for the sake of peace and security in the region, start working with China toward a negotiated and mutually acceptable settlement.
1 Gavan McCormack, “Small Islands - Big Problem: Senkaku/Diaoyu and the Weight of History and Geography in China-Japan Relations,” The Asia-Pacific Journal Vol 9, Issue No 1, January 3, 2011; http://www.japanfocus.org/-Gavan-McCormack/ 3464
2 Tao Cheng, “The Sino-Japanese Dispute Over the Tiao-yu-tai (Senkaku) Islands and the Law of Territorial Acquisition”, 14 Virginia Journal of International Law 221, 221 (1973)
3 Ministry of Foreign Affairs, Japan, website “The Basic View on the Sovereignty over the Senkaku Islands,”; http : //www.mofa.go.jp/region/asia-paci/senkaku /basic_view.html
4 Diaoyutai is spelled using the Han Yu Pinyin system; using a Wade-Giles Pinyin system it becomes: Tiao-yu-tai.
–For simplicity, Diaoyu Dao is used throughout this article when discussing China's claim/evidence. The term Senkakus is used when discussing Japanese claim/evidence. And Diaoyu Dao/Senkakus or Senkakus/Diaoyu Dao is used when referring to the competing claims from both Japan and China.
–Both Diaoyu Dao and Senkakus are used in this paper as a group noun denoting the archipelago or the group of five islets and three outcroppings
–The authors are of the view that there is only one China and that Taiwan and mainland China are integral parts of this one China. Therefore, in this article, the authors use China to refer to both the officially recognized government, the People's Republic of China (PRC], and this one China, unless a distinct reference is called for, in which case the Republic of China (ROC) or Taipei is used to refer to Taiwan.
5 The Japan Times online, “Tokyo nixed joint Senkaku exploitation,” Oct. 22, 2010; http://www.japantimes.co.jp/text/nn20101022a1.html
6 For details of this agreement on joint development, see The National Bureau of Asian Research, “Disputed Claims in the East China Sea: An Interview with James Manicom by Chris Acheson,” July 25, 2011 available at http://www.nbr.org/research/activity.aspx?id=1 59
7 The Asahi Shimbun, “Central government plans to buy Senkaku Islands,” July 7, 2012; s/AJ201207070062 –Needless to say, the Chinese, Chinese Diaspora and Chinese media noticed the date of July 7, a day in which 75 years ago on the pretext of the Marco Polo Bridge Incident, Japan began her comprehensive invasion of China in the Asia-Pacific War.
8 The Japan Times online, “Noda speaks with China, South Korea leaders, seeks to view disputes from ‘broad viewpoints’,” September 10, 2012; http://www.japantimes.co.jp/text/nn20120910a1.html
9 Linus Hagström, “China-Japan tensions over Senkaku purchase an orchestrated affair,” East Asia Forum, September 17, 2012;
http://www.eastasiaforum.org/2012/09/17/china -japan-tensions-over-senkaku-purchase-an-orchestrated-affair /
10 Communist Party of China website, “Full text of Statement of the Ministry of Foreign Affairs of the People's Republic of China,”; http://english.cpc.people.com.cn/66102/7944368.html
11 Ministry of Foreign Affairs of the People's Republic of China website, “Remarks by Assistant Foreign Minister Le Yucheng at the Symposium on the Issue of Diaoyu Dao,” September 14, 2012; http://www.fmprc.gov.cn/eng/zxxx/t969558.htm;
Global Times, “Japan opposes China's Diaoyu map bid at UN,” September 25, 2012; http://www.globaltimes.cn/content/735206.shtml
12 Associated Press, “China relentlessly harries Japan in island dispute,” November 5, 2012; http://news.yahoo.com/china-relentlessly-harrie s-japan-island-dispute-092642850.html
13 Global Times, “China announces names of geographic entities on Diaoyu Islands, “ September 22, 2012; www.globaltimes.cn/content/734633.shtml
14 Chinese Government Official Web Portal, “White Paper: Diaoyu Dao, an Inherent Territory of China,” September 2012; http : //english.gov.cn/official/2012-09/25/content_2232763.htm
15 Global Times, online, “Backing off not an option for China,” September 15, 2012; http://www.globaltimes.cn/content/733253.shtml
16 Paul O'shea, “Sovereignty and the Senkaku/Diaoyu Territorial Dispute, Working Paper 240,” European Institute of Japanese Studies, Stockholm School of Economics, September 2012; www.hhs.se/EIJS/Research/Documents/240.pdf
17 Government Releases, Delegation Culturelle et Economique de Taipei Website, “Summary of historical facts concerning Japan's secret and illegal occupation of the Diaoyutai Islands,” September 17, 2012;
http://www.roc-taiwan.org/CH/ct.asp?xItem=30 8649&ctNode=1253&mp=157
18 New York Times, October 10, 2012, A7
19 Kyodo News, “Anti-Japan protests erupt in 85 cities in China with some vandalism,” September 16, 2012; http://english.kyodonews.jp/news/2012/09/182708.html
20 Taipei Times, “Taiwanese flotilla sails to Diaoyutais,” September 25, 2012;
http://www.taipeitimes.com/News/front/archive s/2012/09/25/2003543597
21 AFP News, “Taiwan rally against Japan over disputed islands,” September 30, 2012; http://sg.news.yahoo.com/taiwan-rally-against-japan-over-disputed-islands-103518558.html
22 US Department of State, Daily Press Briefing, Washington, DC, August 28, 2012;
www.state.gov/r/pa/prs/dpb/2012/08/196986.htm
23 Japan Times, “China hits Japan-Taiwan fishing talks,” October 10, 2012; http://www.japantimes.co.jp/text/nn20121010b1.html
24 Reuters, “Japan sees no need to compromise on island sovereignty: PM Noda,” September 26, 2012; http://www.reuters.com/article/2012/09/26/japa n-china-noda-idUSL1E8KQFVW2012 0926; apparently MOFA in December changes its tune to “[t]here exists no issue of territorial sovereignty to be resolved concerning the Senkaku Islands,” rather than “there is no dispute.”
25 Han-yi Shaw, “The Diaoyutai/Senkaku Islands Dispute: Its history and an analysis of the ownership claims of the P.R.C., R.O.C. and Japan,” Occasional Papers No. 3, University of Maryland, 1-148 (1999)
Hungdah Chiu, “An Analysis of the Sino-Japanese Dispute Over the Tiaoyutai Islets (Senkaku Gunto),” 15 Chinese (Taiwan) Y.B. Int'l & Aff 9, 9-10 (1996)
Tao Cheng, supra
26 “Basic View” supra
27 Toshio Okuhara, “The Territorial Sovereignty over the Senkaku Islands and Problems on the Surrounding Continental Shelf”, 11 Japan Annual of International Law, 97, 98 (1967);
cited in Martin Lohmeyer, “The Diaoyu / Senkaku Islands Dispute: Questions of Sovereignty and Suggestions for Resolving the Dispute,” University of Canterbury, Master's Thesis, 1, 59 (2008); available at ir.canterbury.ac.nz/bitstream/10092/4085/1/the sis_fulltext.pdf; “White Paper,” PRC, supra
28 Ministry of Foreign Affairs of Japan, Nihon Gaiko Bunsho (Japan Foreign Affairs Document), Vol. 18 (Tokyo:1950), 573, translated by Shaw, supra 72
29 Id., 573, translated by Shaw, supra 74
30 Id., 575, translated by Shaw, supra 75
31 Shaw, supra 76
32 Id., 80-84; Shaw's interpretation of documents he received from Prof. Chang Chi-hsiung
33 Id., 86
34 Id., 32
35 Steven Wei Su, “The Territorial Dispute over the Tiaoyu/Senkaku Islands: An Update,” 36 Ocean Development and International Law, 45, note 45 at 60 (2005); See the status of the other 5 outcroppings at Cheng, supra note 3 at 246
36 Shaw, supra 100
37 Id.
38 Id., 101
39 Unryu Suganuma, Sovereign rights and territorial space in Sino-Japanese Relations: Irredentism and the Diaoyu/Senkaku Islands, (Honolulu: University of Hawai'i Press, 2000), 107.
40 Shaw, supra 104-105
41. Suganuma, supra 94
42 Surya P. Sharma, Territorial Acquisition, Disputes and International Law, 63 (1997)
43 John Dugard, Daniel L. Bethlehem, & Max Du Plessis, International Law: A South African Perspective, 3rd Edition, 133 (2006)
44 Han-yi Shaw, “The Inconvenient Truth Behind the Diaoyu/Senkaku Islands,” New York Times, September 19, 2012;
kristof.blogs.nytimes.com/2012/09/19/the-inconvenient-truth-behind-the-diaoyusenkaku-islands/
45 Wani Yukio, “Barren Senkaku Nationalism and China-Japan Conflict,” The Asia-Pacific Journal, Vol 10, Issue 28, No. 4, July 9, 2012; http://www.japanfocus.org/-Wani-Yukio/3792
46 Shaw, supra 31
47 Ministry of Foreign Affairs, Japan, “Q&A on the Senkaku Islands,” Q3; www.mofa.go.jp/region/asia-paci/senkaku/qa_1010.html
48 Sharma, supra 108
49 Id.
50 “Q & A on the Senkaku,” supra A5; http://www.mofa.go.jp/region/asia-paci/senkaku /qa_1010.html,
51 “Basic View,” supra
52 Sharma, supra 168
53 William B. Heflin, “Diaoyu/Senkaku Islands Dispute: Japan and China, Oceans Apart,” 18 Asian-Pacific Law and Policy Journal 1-22 (2000)
54 “Adverse Possession,” Legal Information Institute, Cornell University Law School at http://www.law.cornell.edu/wex/adverse_possession
55 Richard Helmholz, “Adverse Possession and Subjective Intent,” 61 Wash. U. L.Q. 331, 334 (1983)
56 Jeffrey E. Stake, “The Uneasy Case for Adverse Possession,” Faculty Publications. Paper 221, 2434 (200); www.repository.law.indiana.edu/facpub/221/
57 Sharma, supra 168
58. I. C. MacGibbon, “The Scope of Acquiescence in International Law,” 31 Brit. Y.B. Int'l L. 143, 144 (1954)
59 Id., 168
60 Id., 172
61 “Shelve What Controversy? Develop What Resources? With Whom?” China Times, editorial (Taipei, Taiwan, ROC), November 5, 2012, translated by Bevin Chu and available at http://datelinetaipei.blogspot.tw/2012/11/shelve -what-controversy-develop-what_1488.html
62 Deng Xiaoping speech on the Diaoyu Dao conflict, quoted in Chi-Kin Lo, “China's Policy Towards Territorial Disputes: The case of the South China Sea Islands,” 171-172 (1989); see BBC Summary of World Broadcasts, June 1, 1979 for a similar quote
63 Stephen Harner “Interview with Professor Yabuki on the Senkaku/Diaoyu Crisis and US-China-Japan Relations,” Forbes, October 3, 2012;http://www.forbes.com/sites/stephenharn er/2012/10/03/interview-with-professor-yabuki-on-the-senkakudiaoyu-crisis-and-u-s-china-japan-relations/
64 “Q & A on the Senkaku,” supra A14
65 M. Taylor Fravel “Explaining Stability in the Senkaku (Diaoyu) Dispute,” in Gerald Curtis, Ryosei Kokubun and Wang Jisi, eds., Getting the Triangle Straight: Managing China-Japan-US Relations (Washington, DC: The Brookings Institution Press, 144, 151 (2010); article available at http://taylorfravel.com/documents/research/frav el.2010.stabiltiy.senkakus.pdf 3-155
66 Fravel, supra 153-155
67 China Times editorial, supra
68 Fravel, supra, 154
69 Ayako Mie, “No quick Senkakus fix, but return to status quo likely: domestic issues preventing quick resolution of row,” Japan Times online, Oct. 12, 2012; http://www.japantimes.co.jp/text/nn20121012f1.html
70 Sharma, supra 111
71 Contrary to American public opinion, the Chinese government also has limited room to maneuver. It has to respond to its domestic constituency's anger at Japan's denials of war crimes and whitewashing of atrocities in textbooks. China's legitimacy, too, rests in large part on the ability to preserve the nation's territorial integrity after a century of dismemberment by foreign powers.
72 M. Taylor Fravel, Strong Borders, Secure Nation: Cooperation and Conflict in China's Territorial Disputes, (Princeton: Princeton University Press, 2008).
73 “Basic View,” supra
74 Treaty of Shimonoseki, available at http://www.taiwandocuments.org/shimonoseki01.htm
75 “White Paper,” supra
76 “Summary of historical facts concerning Japan's secret and illegal occupation of the Diaoyutai Islands,” supra
77 Shaw, supra 109
78 Id., 112
79 Vienna Convention on the Law of Treaties, 1155 U.N.T.S. 331, 8 I.L.M. 679, entered into force Jan. 27, 1980, Article 31 (1), available at http://www.unhcr.org/refworld/docid/3ae6b3a10.html
80 Treaty of Shimonoseki, supra
81 Cairo Declaration, Dec. 1, 1943, 3 U.S.T. 858, available at http://avalon.law.yale.edu/wwii/cairo.asp
82 Potsdam Declaration, July 26, 1945, 3 U.S.T. 1204, para. 8, available at http://en.wikisource.org/wiki/Potsdam_Declaration
83 “General Headquarters, Supreme Commander for the Allied Powers (SCAP): SCAPIN No. 677: Governmental and Administrative Separation of Certain Outlying Areas from Japan,” 194/1/29 [US NARA/DC/S Scap file] available at http://en.wikisource.org/wiki/SCAPIN677
84 “Basic View,” supra
85 Treaty of Peace with Japan, Sept 8, 1951, 3
U.S.T. 3169, 136 U.N.T.S., 45, hereinafter referred to as the San Francisco Peace Treaty or SFPT; available at http://www.taiwandocuments.org/sanfrancisco01.htm
86 Foreign Relations of the United States, 1950, Vol. VI, 1325 Koo assumed that the ROC would eventually regain control of mainland China.
87 Id.
88 VCLT, supra Article 32
89 Seokwoo Lee, “The 1951 San Francisco Peace Treaty with Japan and the Territorial Disputes in East Asia,” 11 Pacific Rim Law & Policy Journal, 63, 124 (2002)
90 Id.; Kimie Hara, Cold War Frontiers in the Asia Pacific: Divided Territories in the San Francisco Peace Treaty (London: Routledge, 2007), 54.
91 “San Francisco Peace Treaty,” supra
92 “Basic View,” supra
93 Koji Taira, “The China-Japan Clash Over the Diaoyu/Senkaku Islands,” Spring, The Ryukyuanist, (2004). A revised and expanded version of the article available at http://www.japanfocus.org/-Koji-Taira/2119
94 United States Civil Administration of the Ryukyus (USCAR) Number 27, (Washington, 1953) reprinted in Kikan Okinawa [Okinawa Quarterly] 56, 108 (March 1971); cited by Suganuma, supra, 122
95 John Price, “A Just Peace? The San Francisco Peace Treaty in Perspective,” Japan Policy Research Institute, Working Paper No. 78, June 2001, available at http://www.jpri.org/publications/workingpapers/wp78.html
96 Michael Schaller, Altered States: The United States and Japan Since the Occupation, (New York: Oxford, 1997), 41.
97 “Basic View,” supra
98 United Nations Declaration, January 1, 1942, available at http://www.un.org/en/aboutun/charter/history/declaration.shtml
99 From Documents on New Zealand External Relations [DNZER], Vol. III, 1095 (1985), quoted in Price, supra
100 The Memorandum of the Chinese Ministry of Foreign Affairs to the US Ambassador in Taipei, November, 1953 and China, Legislative Yuan, Li-fa-yuan Kung-pao [The Records of the Legislative Yuan], 12th Session, No. 8 (Jan. 15, 1954), 88-89; cited in Cheng supra, note 102 at 252
101 “Basic Fact,” supra
102 Agreement Between the United States of America and Japan Concerning the Ryukyu Islands and the Daito Islands, 17th June, 1971 (commonly know as the Okinawa Reversion Treaty), U.S.T., Volume 23, Part 1, 449-458; available at http://www.ioc.u-tokyo.ac.jp/~worldjpn/docume nts/texts/docs/19710617.T1E.html
103 United Nations website, Charter of the United Nations, Chapter XII, available at http://www.un.org/en/documents/charter/chapt er12.shtml;
104 US Congress, Senate Committee on Foreign Relations, Okinawa Reversion Treaty Hearing, 92nd Cong., 1st Sess. October 27, 28, and 29, 1971. Washington, US Govt. Print. Office, 1971. p. 89-90.
105 The Treaty of Mutual Cooperation and Security Between Japan and the United States, 11 U.S.T. 1632. It was signed on January 19, 1960, and entered into force on June 23 of the same year, commonly known as the US-Japan Mutual Security Treaty
106 O'shea, supra 4
107 Document 113: Memorandum of Conversation, available at http://history.state.gov/historicaldocuments/frus1969-76v17/d113; Source: National Archives, Nixon Presidential Materials, NSC Files, Box 1025, President/HAK Memcons, Memcon—the President, Kissinger, and Amb. Chow Apr. 12, 1971. Top Secret; Sensitive; Eyes Only. The President's Daily Diary indicates that Chow met with the President from 11:31 a.m. to 12:05 p.m. and that Emil Mosbacher, Chief of Protocol for the Department of State, was also present. (Ibid., White House Central Files) The conversation was recorded by the White House taping system. The statements in quotations marks are actually paraphrases. (Ibid., White House Tapes, Recording of conversation between Nixon and Kissinger, April 12, 1971, 11:28 a.m. −12:41 p.m., Oval Office, Conversation No. 477-3)
–Id. Footnote 6 “Chow gave a 4-page aidemémoire to Green on September 16, 1970, outlining the ROC's objections to Japanese sovereignty over these islands. (National Archives, RG 59, EA/ROC Files: Lot 75 D 61, Subject Files, Petroleum - Senkakus, January - September 1970)”
–Document 114: Conversation between Chow and Kissinger, available at http://history.state.gov/historicaldocuments/fru s1969-76v17/d114; Source: National Archives, Nixon Presidential Materials, NSC Files, Country Files, Far East, China, Vol. VI. Confidential. Sent for information. Drafted on April 14. The meeting was held in Kissinger's office. In an April 14 covering memorandum, Holdridge suggested that no further distribution be made. Kissinger initialed his approval. (Ibid.) Kissinger and Chow met from 3:31 to 3:47 p.m. (Library of Congress, Manuscript Division. Kissinger Papers, Box 480, Miscellany, 1968-1976, Record of Schedule)
108 Document 115: State's presentation of Chinese, available at http://history.state.gov/historicaldocuments/fru s1969-76v17/d115; Source: National Archives, Nixon Presidential Materials, NSC Files, Box 521, Country Files, Far East, China, Vol. VI. Confidential. Sent for information. A notation on the memorandum indicates Kissinger saw it on April 23.
109 Document 134: BackChannel Com to Taiwan Ambassador mostly on trade, available at http://history.state.gov/historicaldocuments/fru s1969-76v17/d134; Source: National Archives, Nixon Presidential Materials, White House Special Files, President's Office Files, Box 87, Memoranda for the President. Secret; Eyes Only.
110 “Senkaku (Diaoyu/Diaoyutai) Islands Dispute: US Treaty Obligations,” US Congressional Research Service (Mark E. Manyin, Specialist in Asian Affairs), September 25, 2012; available at http://www.fas.org/sgp/crs/row/R42761.pdf
111 Pacific News Center, “Senate Approves Webb Amendment to Reaffirm US Commitment to Japan on the Senkaku Islands,” November 30, 2012 available at http : //www.pacificnewscenter.com/index.php?option=com_content&view=article&id=29470:s enate-approves-webb-amendment-to-reaffirm-us-commitment-to-japan-on-the-senkaku-islands&catid=45:guam-news&Itemid=156
112 Kevin Voight, “Dangerous Waters: Behind the Islands Dispute,” CNN September 24, 2012; http://www.cnn.com/2012/09/24/world/asia/china-japan-dispute-explainer/index.html
113 Senate Committee on Foreign Relations, supra; also N.Y. Times, Apr. 23, 1972, at 17, col. 1
114 Seokwoo Lee, “Territorial Disputes in East Asia, the San Francisco Peace Treaty of 1951, and the Legacy of US Security Interest in East Asia,” note 51 at 58, based on Telegram regarding Senkaku Islands, US NARA/Doc. No.: Pol 32-6 Senkaku Is; XR Pol 33 China Sea (Sept .4, 1970); Telegram Regarding Senkaku Islands, id., (September 14, 1970) in Seokwoo Lee & Hee Eun Lee, Ed., Dokdo: Historical Appraisal and International Justice, (2011). In fact, Price in his “A Just Peace?” wrote US really wanted to leave Japan with only an illusory residual sovereignty: “As the Cold War escalated, the United States government and military turned Okinawa into a major military center, with major construction beginning in October 1949 with a $58 million appropriation. In subsequent discussions, the military made it very clear that it wanted absolute control over Okinawa and thus in the SFPT the US left Japan with only an illusory “residual sovereignty” over Okinawa.“
115 Case law refers to “[t]he law based on judicial opinions (including decisions that interpret statutes), as opposed to law based on statutes, regulations, or other sources. Also refers to the collection of reported judicial decisions within a particular jurisdiction dealing with a specific issue or topic.” Definition provided by Cornell University Law School, Legal Information Institute at http://www.law.cornell.edu/wex/case_law
116 Brian Taylor Sumner, “Territorial Disputes at the International Court of Justice,” 53 Duke Law Journal, 1779-1812 (2004)
117 Id., 1787
118 Heflin, supra
119 Yehuda Z. Blum, Historic Titles in International Law, (The Hague: Martinus Nijhoff, 1965), 208.
120 1933 P.C.I.J. (Ser. A/B) No 53, at 22
121 Id.
122 Sharma, supra 77
123 Id., 56
124 Oscar Svarlien, The Eastern Greenland Case in Historical Perspective, University of Florida Monograph, Social Science, No. 21, 69-74 (1964)
125 Grieg, supra note 2 at 162 140 cited in Sharma, supra 81-82
126 The Island of Palmas Case, 2 R.I.A.A. 829 (Perm Ct. Arb. 1928); see also Sharma, supra 98-99
127 “Intertemporal Law”, International Law: Law and Interpretation, USLegal.com
128 The Island of Palmas Case, supra 839, quoted in Sharma, supra 71-72
129 Phillip C. Jessup, “The Palmas Island Arbitration,”, 22 Am. J. Int'l L. 735, 740 (1928)
130 “Q & A on the Senkaku Islands”, supra A3
131 The Island of Palmas Case, supra 867
132 Sovereignty over Pulau Ligitan and Pulau Sipadan, 2002 I.C.J. 625, 630
133 Press Release, ICF/605, ”International Court Finds that Sovereignty over Islands of Ligitan and Sipadan belongs to Malaysia,” December 17, 2002.
134 ”Q & A on the Senkaku Islands,” supra, A3
135 O'shea, supra, 4; Fravel, supra 150
136 O'shea, supra 4
137 China Times editorial, supra
138 Julian Ku, ”Why Won't Korea Accept Japan's Invitation to Go to the ICJ?,” Opinio Juris, August 20, 2012. ”Noda Reshuffles Cabinet Again” China Daily, October 2, 2012.
139 Carlos Ramos-Mrosovsky, ”The International Laws Unhelpful Role in The Senkaku Islands”, 29 U. PA J. Int'l L. 903, 937 (2008)
140 Id.