This text provides a detailed account of the conservation efforts for Okinotorishima, a coral reef located in the Pacific Ocean south of Okinawa, Japan. The summary can be divided into the following key points:
1. **Location**: Okinotorishima is situated 1740 kilometers south of central Tokyo and is the only tropical island at the southern tip of Japan.
2. **Island Description**: The island consists of two parts, Higashikojima and Kitakojima, surrounded by concrete and iron blocks. A titanium net protects it from the elements.
3. **Historical Background**: The island has a history of research and observation, dating back to the early 20th century.
4. **Conservation Efforts**: Since 2009, the Japanese government has been working to prevent the island from submerging due to rising sea levels.
5. **Construction Details**: The construction involved installing iron blocks and concrete around the island to protect it from waves and erosion. These measures are in accordance with international agreements to maintain the island's status as a naturally formed land.
6. **Infrastructure Restoration**: The text describes the restoration of the weather observation facility and the University of Tokyo infrastructure on the island.
7. **Future Conservation**: Ongoing research and efforts to preserve Okinotorishima in the face of rising sea levels are mentioned.
8. **Economic Activities**: There are attempts to promote economic activities around the island, such as fishing, and the establishment of the University of Tokyo on the island for safety and research.
9. **Global Awareness**: Steps have been taken to raise global awareness of Okinotorishima's existence and significance.
10. **Conclusion**: The text emphasizes that Okinotorishima should not be used solely as a base for enclosing the surrounding seas but should also contribute to international environmental efforts.
Overall, the summary outlines the comprehensive efforts made by Japan to preserve Okinotorishima in the face of environmental challenges while respecting international agreements and promoting sustainable activities around the island.
Here are the key facts extracted from the provided text:
1. Okinotorishima is located 1740km south of central Tokyo.
2. It is the only tropical island at the southern tip of Japan.
3. There are two islands within the coral reef: Higashikojima and Kitakojima.
4. The island is surrounded by small iron blocks and concrete.
5. A titanium net protects the island from harsh weather.
6. The area of Higashikojima is 1.58m2, and Kitakojima is 7.86 square meters in area.
7. Okinotorishima was built before the war as a weather observation facility.
8. Conservation work on Okinotorishima began in 2009 to prevent it from being submerged.
9. The island is located at 20°25'N latitude and 136°5'E longitude.
10. Various research and observation activities have been conducted in the area.
11. Construction work on Okinotorishima was interrupted during the Pacific War.
12. The conservation work involved installing concrete blocks and other measures to protect the island.
13. Special concrete was used to withstand the rough waves and preserve the island.
14. The sea around Okinotorishima is very harsh, and weather conditions affected the work.
15. The conservation work is in accordance with the United Nations Liberation Treaty.
16. The island is surrounded by deep sea, making anchoring difficult.
17. The future preservation of Okinotorishima involves experiments and research to address rising sea levels.
18. The Tokyo Metropolitan Government supports economic activities on the island, including fishing industries.
19. The University of Tokyo established a presence on Okinotorishima to ensure the safety of nearby waters.
20. The name of Okinotorishima Lighthouse is listed on nautical charts and University of Tokyo tables.
These facts provide an overview of the key information in the text, without including opinions or commentary.