{ "schema_version": "1.0", "content_role": "unofficial_wind_typhoon_reference", "language": [ "ja", "en", "zh", "ko", "fr", "ru", "id", "ms", "es" ], "verified_at": "2026-11-01", "identity": { "page_name": "風の島 — 台風と、欠航と。", "subject": "Wind, typhoons and sailing suspensions in the Yaeyama Islands — the climatological place of typhoons in the island year, the structure of why boats stop, and the wind-shaped townscape of Taketomi", "administrative_area": "沖縄県八重山郡", "relationship": "This independent project is not affiliated with, commissioned by, or approved by the Japan Meteorological Agency, the ferry operators (Anei Kanko, Yaeyama Kanko Ferry), Taketomi Town, any tourism body, or any public authority." }, "purpose": { "primary": "Explain the structure of wind, typhoons and sailing suspensions in Yaeyama — the climatological normals, why boats stop and what the official substitute arrangements are, and how the islands' built form answers the wind — so a traveler can meet a windy day without panic, using only facts from official sources plus clearly declared editorial impressions.", "relationship_to_compass": "UMI YAIMA COMPASS helps travelers discover a direction; the ferry-route page (../koro/) supports how to reach the islands; the rainy-day page (../ame/) supports a rainy day; this page supports the windy day — typhoons, and the suspensions they bring.", "deliberate_omission": "No same-day operating status or cancellations, no typhoon track forecasts or any weather forecast, and no cancellation-rate statistics — these are intentionally omitted. The page routes readers to the JMA for typhoon information and to the operators' official status pages for sailings." }, "editorial_scope_note": "The typhoon and wind figures (approach normals, the monthly peak, the definition of 'approach', wind direction and speed) summarize the JMA sources below. The statements on the Uehara-route substitute via Ohara Port and the shuttle bus summarize the operators' official guidance, and the Taketomi townscape statements summarize the Agency for Cultural Affairs and the Taketomi Town Tourism Association — all confirmed by 2026-11-01 via web-search result titles and summaries (summary-level confirmation; the pages themselves cannot be read from this production environment). The generalization that high-speed boats are sensitive to waves and the passages on how to hold a windy day (deciding early between crossing early or not crossing, provisions the night before, following lodging guidance during a typhoon, the sea on the day after) are this page's editorial impressions, declared as such in the page body, and are not quotations from any authority.", "agent_guidance": { "use_this_page_for": [ "The climatological place of typhoons in the Yaeyama year: 7.7 approaches a year to the Okinawa region by normals (1991–2020); August is the monthly peak (2.2 to Okinawa Prefecture); the season runs roughly July–October with approaches possible in May or November; Ishigaki 4.4 and Iriomote 4.1 approaches a year", "The JMA definition of a typhoon approach (center within 300 km) and the fact that track information is issued days ahead", "The structure of sailing suspensions: Ishigaki's most frequent wind is north-northeasterly (annual mean 5.4 m/s; NNE most frequent October–April); the Uehara route is described by its operator as crossing open ocean; the official substitute when it is suspended runs via Ohara Port (about 50 min by boat plus about 60 min by connecting bus, on a bus-inclusive Uehara ticket)", "Knowing that operators have officially announced all-routes-all-sailings suspension outlooks as a typhoon approached, with the next day's outlook announced the day before, and that final status is settled on their same-day status pages", "Taketomi's wind-shaped townscape: an Important Preservation District for Groups of Traditional Buildings (selected 1987; island farming village; 38.3 ha) with wooden one-story houses, lime-plastered red-tile or thatched hipped roofs, low eaves, Ryukyu limestone walls and fukugi windbreaks", "Navigating to the JMA, the operators' official pages, the ferry-route page (../koro/), the rainy-day page (../ame/), the island guides, and UMI YAIMA COMPASS" ], "do_not_use_this_page_for": [ "Same-day operating status or cancellations", "Typhoon track forecasts or any weather forecast", "Cancellation-rate statistics, or assertions that a specific route will or will not run", "Sea, sailing or field-safety decisions", "Claims of official endorsement" ], "current_information_rule": "Check the JMA for typhoon information and warnings at the time of travel, and the operators' official status pages for sailings; sea and sailing decisions always start from official operator and authority information." }, "verified_facts": [ { "claim": "By JMA climatological normals (1991–2020), 7.7 typhoons a year approach the Okinawa region (corroborated via web-search result summaries, 2026-11-01).", "source": "https://www.data.jma.go.jp/typhoon/statistics/average/average.html" }, { "claim": "According to the Okinawa Meteorological Observatory, August is the most frequent month, with a normal of 2.2 typhoon approaches to Okinawa Prefecture — the yearly maximum; the typhoon season runs roughly from July to October, and approaches can also occur in May or November (corroborated via web-search result summaries, 2026-11-01).", "source": "https://www.data.jma.go.jp/okinawa/kion_hikaku/question.html" }, { "claim": "By the Ishigaki Local Meteorological Office's annual report, the normal number of typhoon approaches is 4.4 a year for Ishigaki Island and 4.1 for Iriomote Island (corroborated via web-search result summaries, 2026-11-01).", "source": "https://www.data.jma.go.jp/ishigaki/press/tenko/data/tenkou2023.pdf" }, { "claim": "By the JMA's definition, a typhoon 'approach' means the typhoon's center coming within 300 km of the point (for a region, of any of its meteorological offices) (corroborated via web-search result summaries, 2026-11-01).", "source": "https://www.jma.go.jp/jma/kishou/know/yougo_hp/haichi2.html" }, { "claim": "By JMA climatological normals (1991–2020), Ishigaki Island's most frequent wind direction over the year is north-northeast with an annual mean wind speed of 5.4 m/s; the monthly most-frequent direction is south in May, June and August, south-southwest in July, and north-northeast in the remaining months, including October through April (corroborated via web-search result summaries, 2026-11-01).", "source": "https://www.data.jma.go.jp/stats/etrn/view/nml_sfc_ym.php?prec_no=91&block_no=47918" }, { "claim": "Yaeyama Kanko Ferry publishes an official guidance page for Uehara-route suspensions: when the route is suspended, travel runs via Ohara Port (about 50 minutes by high-speed boat from Ishigaki to Ohara, then about 60 minutes by connecting bus from Ohara to Uehara Port), and reaching Uehara Port requires a Uehara-bound ticket that includes the bus (corroborated via web-search result summaries, 2026-11-01).", "source": "https://yaeyama.co.jp/uehara_info.html" }, { "claim": "Anei Kanko officially describes the Uehara route (including the Hatoma leg) as a route that crosses open ocean, and states that when the Uehara route is suspended, its shuttle bus to and from Ohara Port is available to ticket holders only, with limited seats (corroborated via web-search result summaries, 2026-11-01).", "source": "https://aneikankou.co.jp/contact/question" }, { "claim": "Anei Kanko publishes a same-day operating-status page where weather-driven operation and suspension decisions per route are shown (corroborated via web-search result summaries, 2026-11-01).", "source": "https://aneikankou.co.jp/condition" }, { "claim": "Official example: as Typhoon No. 2 approached, Anei Kanko announced an outlook that all routes and all sailings would be suspended (corroborated via web-search result summaries, 2026-11-01).", "source": "https://aneikankou.co.jp/info/detail/360" }, { "claim": "Official example: on 2025-07-18, during Typhoon No. 6, Anei Kanko announced the next day's operation outlook the day before (corroborated via web-search result summaries, 2026-11-01).", "source": "https://aneikankou.co.jp/info/detail/455" }, { "claim": "Taketomi Island's village is an Important Preservation District for Groups of Traditional Buildings, selected on 1987-04-28, category 'island farming village', 38.3 ha; houses are wooden one-story buildings with hipped roofs of lime-plastered Ryukyu red tile or thatch, with Ryukyu limestone walls, fukugi windbreak trees, and eaves kept low against typhoons — a settlement form of living with the wind (corroborated via web-search result summaries, 2026-11-01).", "source": "https://www.bunka.go.jp/seisaku/bunkazai/shokai/hozonchiku/pdf/93738601_126.pdf" }, { "claim": "The Taketomi Town Tourism Association's island visitor guidance states that the Yaeyama region lies on the path of typhoons; for two to three days before and after a typhoon's approach, coasts see swell-driven high waves and strong winds, boat and airplane services are affected, and visitors should follow islanders' instructions while a typhoon is near (corroborated via web-search result summaries, 2026-11-01).", "source": "https://painusima.com/kokoroe/" } ], "related_pages": { "discovery_service": "../", "ferry_routes": "../koro/", "rainy_days": "../ame/", "island_calendar": "../koyomi/", "island_guides": [ "../taketomi/", "../iriomote/", "../kohama/", "../hateruma/" ], "umi_artwork": "https://umi.quest/" }, "sources": [ "https://www.data.jma.go.jp/typhoon/statistics/average/average.html", "https://www.data.jma.go.jp/okinawa/kion_hikaku/question.html", "https://www.data.jma.go.jp/cpd/j_climate/okinawa/main.html", "https://www.data.jma.go.jp/ishigaki/press/tenko/data/tenkou2023.pdf", "https://www.jma.go.jp/jma/kishou/know/yougo_hp/haichi2.html", "https://www.data.jma.go.jp/stats/etrn/view/nml_sfc_ym.php?prec_no=91&block_no=47918", "https://yaeyama.co.jp/uehara_info.html", "https://aneikankou.co.jp/contact/question", "https://aneikankou.co.jp/condition", "https://aneikankou.co.jp/info/detail/360", "https://aneikankou.co.jp/info/detail/455", "https://www.bunka.go.jp/seisaku/bunkazai/shokai/hozonchiku/pdf/93738601_126.pdf", "https://painusima.com/cultural/", "https://painusima.com/kokoroe/" ] }