About the three countriesHistory
About the three countries
| Ukraine | Poland | Japan |
| CapitalKyiv | CapitalWarsaw | CapitalTokyo |
| Official languageUkrainian | Official languagePolish | Official languageJapanese |
| Land area603,700㎢ | Land area312,679㎢ | Land area377,974㎢ |
| Population43.73 million (2020) | Population37.84 million (2020) | Population126.14 million (2020) |
| Population density75 persons/㎢ | Population density124 persons/㎢ | Population density333 persons/㎢ |
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1939-45: The Second World War |
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| Ukraine was the scene of fierce fighting between Germany and the Soviet Union | ||
| 1952Establishment of the People's
Republic of Poland (a satellite state subordinate to the Soviet Union) |
1952Sovereignty was restored by the San Francisco Peace Treaty. | |
| 1954Crimean Peninsula transferred from Russia to Ukraine | ||
| 1972Reversion of Okinawa to Japanese administration | ||
| 1986Chernobyl nuclear power plant accident | ||
| 1989Non-communist government formed | ||
| 1991Became independent with the dissolution of the Soviet Union | ||
| 1995Joined the World Trade Organization (WTO) | 1995Great Hanshin-Awaji Earthquake | |
| 1999Joined NATO | ||
| 2004Joined EU | ||
| 2011Great East Japan Earthquake | ||
| 2014Russia's annexation of Crimea | ||
| 20222.24 Russian invasion of Ukraine began | ||
Historical Episodes
| Ukraine | Poland | Japan |
| 1920Starving Polish Orphans from
Siberia 765 orphans from Siberia |
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| Koki, the third son of Markan Borishko from Kharkov (mother is Japanese), was a
yokozuna in the Showa period (1926-1989). Koki (mother is Japanese), the third son of Markan Borishko, a native of Kharkov, was a great yokozuna of the Showa period under the name "Taiho. |
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| 1995・6 Invitation to 60 orphans from the Great Hanshin-Awaji Earthquake |
Math Olympiad Competition Results for 3 countries (last 5 years)
| Ukraine | Poland | Japan | |
| 2018 | 4th | 9th | 13th |
| 2019 | 11th | 10th | 13th |
| 2020 | 11th | 6th | 18th |
| 2021 | 6th | 3th | 25th |
| 2022 | Absent | 12th | 8th |