{"article":{"annotation":{"article_id":"japan-freshwater-fish-distribution-survey-finds-range-shifts-2026","available_at":"2026-10-07T03:14:16.072107Z","geography_revision":"ef6ee0010dda5fe7b240fd514749b43e214c57da73222d2e40ec83b276dd0977","id":"3f7214ab2b4d58e102cf0e33bb68f6c385a5c9ae9bf94421bbff377caf2fab6d","input_sha256":"28c0778b339d86a0d2972498b1bee659e407547dbcb4049a711e688ddb0292b4","limitations":["Rule-derived subjects are candidates, not verified editorial labels or calibrated model probabilities.","Coverage is distinct from event location. Unknown country/city/coordinates remain absent; no automatic geocoding.","Article geometries keep their stated precision and methodology; reproducing them is not independent coordinate verification."],"method":"controlled-rules-v1","places":[{"admin1":null,"city":null,"coordinate_note":null,"coordinate_reference_system":"OGC:CRS84","coordinate_source":null,"country":"JP","evidence":[{"field":"country","language":"en","note":"Explicit preserved editorial country/region; no city or national centroid inferred","source_urls":["https://www.env.go.jp/press/press_05633.html"]}],"geometry":null,"id":"iso3166-1:JP","kind":"country-or-area","labels":{"ar":"اليابان","en":"Japan","es":"Japón","fr":"Japon"},"match_status":"candidate","precision":"regional","role":"coverage","uncertainty_m":null}],"rules_sha256":"d28c9c89703b56bd91fd887965d416d0115c2473d4bfbd3e558bcceafc3941dd","schema_version":1,"subjects":[{"concept_id":"medtop:20000441","confidence":null,"confidence_method":null,"evidence":[{"field":"en.title+en.summary","language":"en","note":"Subject suggested from the title or summary: species","source_urls":["https://www.env.go.jp/press/press_05633.html"]}],"method":"controlled-rules-v1","rule_id":"nature","status":"candidate"}],"taxonomy_revision":"1f2db31d811fca07e99b16d402c10e2cc2965c9df1c7b41d9be348b40a24e7fb","taxonomy_version":"IPTC Media Topics 2026-Q2"},"api_url":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026?lang=en","category":"environment","content":{"key_points":[],"paragraphs":["Japan’s Environment Ministry published results on freshwater fish from a nationwide baseline nature survey covering 2022–2025 on 5 October. The survey compiled distribution information for 113 of its 115 target species and also organized records for 11 related species outside the target group.","The findings indicate northward range shifts for some brackish-water and migratory fish and spread of some Japanese native species into other river systems through human introduction. Researchers also confirmed an invasive fish for the first time in a Honshu river during fieldwork in the Tone River basin in Gunma in 2024; the ministry said environmental DNA samples there had detected traces in 2023 and 2024."],"sections":[]},"corrections":[{"at":"2026-10-07T00:55:12+03:00","language":"en","text":"German and Portuguese editions and translations of the data and correction explanations have been added to this article."},{"at":"2026-10-07T05:58:03+03:00","language":"en","text":"Data classification added: each figure now carries a measure identifier with its unit, geography, frequency and type. No figure, unit or date changed."}],"country":"JP","data":{"blocks":[{"description":{"ar":"عدد الأنواع المستهدفة التي جمع مسح الأسماك العذبة 2022–2025 معلومات عن توزيعها.","de":"Anzahl der Zielarten, für die die Süßwasserfischerhebung 2022–2025 Verbreitungsinformationen erfasste.","en":"Number of target species for which the 2022–2025 freshwater fish survey compiled distribution information.","es":"Número de especies objetivo para las que el estudio 2022–2025 reunió datos de distribución.","fr":"Nombre d’espèces ciblées dont l’étude 2022–2025 a compilé des données de répartition.","pt":"Número de espécies-alvo para as quais o levantamento de peixes de água doce de 2022–2025 reuniu informações de distribuição.","tr":"2022-2025 tatlı su balığı araştırmasında dağılım bilgisi derlenen hedef tür sayısı."},"id":"distribution-records","items":[{"basis":"observed","label":{"ar":"الأنواع","de":"Arten","en":"Species","es":"Especies","fr":"Espèces","pt":"Espécies","tr":"Tür sayısı"},"measure":{"aggregation":"stock","frequency":"annual","geography":"japan","id":"japan-freshwater-fish-species-with-distribution-records","periodRole":"reference-period","unitCode":"count"},"period":"2025","unit":"species","value":113}],"methodology":{"ar":"العدد الوارد في بيان وزارة البيئة اليابانية في 5 أكتوبر 2026: توفرت سجلات توزيع لـ113 من أصل 115 نوعاً مستهدفاً؛ لم تُحسب نسبة.","de":"Am 5. Oktober 2026 vom Umweltministerium Japans genannte Zahl: Für 113 von 115 Zielarten lagen Verbreitungsnachweise vor; es wird keine Quote berechnet.","en":"Count stated by Japan’s Environment Ministry on 5 October 2026: distribution records were obtained for 113 of 115 target species; no rate is calculated.","es":"Recuento indicado por el Ministerio de Medio Ambiente de Japón el 5 de octubre de 2026: se obtuvieron datos de distribución para 113 de las 115 especies objetivo; no se calcula una tasa.","fr":"Nombre indiqué par le ministère japonais de l’Environnement le 5 octobre 2026 : des données de répartition ont été obtenues pour 113 des 115 espèces ciblées ; aucun taux n’est calculé.","pt":"Contagem informada pelo Ministério do Meio Ambiente do Japão em 5 de outubro de 2026: foram obtidos registros de distribuição para 113 das 115 espécies-alvo; nenhuma proporção é calculada.","tr":"Japonya Çevre Bakanlığının 5 Ekim 2026 tarihli duyurusundaki 115 hedef türden 113’ü için elde edilen kayıt sayısı; oran hesaplanmamıştır."},"sourceUrls":["https://www.env.go.jp/press/press_05633.html"],"title":{"ar":"الأنواع المستهدفة ذات سجلات التوزيع","de":"Zielarten mit dokumentierten Verbreitungsgebieten","en":"Target species with distribution records","es":"Especies objetivo con datos de distribución","fr":"Espèces ciblées avec données de répartition","pt":"Espécies-alvo com registros de distribuição","tr":"Dağılımı belirlenen hedef türler"},"type":"metrics","updatedAt":"2026-10-07T00:55:12+03:00"}],"version":1},"data_downloads":[{"formats":{"csv":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026/data/distribution-records?lang=en&format=csv","json":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026/data/distribution-records?lang=en&format=json"},"id":"distribution-records"}],"data_types":["metrics"],"editorial_illustration":null,"event_id":"event-3f895335-f4ad-5b9c-9419-161e3dc3fd14","event_period":"2026-10-05","event_period_basis":"event-or-reference-period","id":"japan-freshwater-fish-distribution-survey-finds-range-shifts-2026","image":null,"importance":0.6,"language":"en","modified_at":"2026-10-07T05:58:03+03:00","publication_basis":"publication-record","published_at":"2026-10-06T08:59:00+00:00","reading_minutes":1,"region":"world","section_illustration":null,"slug":"japan-freshwater-fish-distribution-survey-finds-range-shifts-2026","sources":[{"checkedAt":"2026-10-06","name":"Japan Ministry of the Environment","publishedAt":"2026-10-05","url":"https://www.env.go.jp/press/press_05633.html"}],"summary":"Japan’s Environment Ministry published results on freshwater fish from a nationwide baseline nature survey covering 2022–2025 on 5 October. The survey compiled distribution information for 113 of its 115 target species and also organized records for 11 related species outside the target group.","text":"Japan’s Environment Ministry published results on freshwater fish from a nationwide baseline nature survey covering 2022–2025 on 5 October. The survey compiled distribution information for 113 of its 115 target species and also organized records for 11 related species outside the target group.\n\nJapan’s Environment Ministry published results on freshwater fish from a nationwide baseline nature survey covering 2022–2025 on 5 October. The survey compiled distribution information for 113 of its 115 target species and also organized records for 11 related species outside the target group.\n\nThe findings indicate northward range shifts for some brackish-water and migratory fish and spread of some Japanese native species into other river systems through human introduction. Researchers also confirmed an invasive fish for the first time in a Honshu river during fieldwork in the Tone River basin in Gunma in 2024; the ministry said environmental DNA samples there had detected traces in 2023 and 2024.\n\nGerman and Portuguese editions and translations of the data and correction explanations have been added to this article.\n\nData classification added: each figure now carries a measure identifier with its unit, geography, frequency and type. No figure, unit or date changed.","title":"Japan survey maps distributions for 113 of 115 freshwater fish species","topics":[],"translations":[{"api_url":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026?lang=tr","language":"tr","url":"https://newsverum.com/tr/news/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026"},{"api_url":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026?lang=en","language":"en","url":"https://newsverum.com/en/news/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026"},{"api_url":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026?lang=ar","language":"ar","url":"https://newsverum.com/ar/news/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026"},{"api_url":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026?lang=fr","language":"fr","url":"https://newsverum.com/fr/news/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026"},{"api_url":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026?lang=es","language":"es","url":"https://newsverum.com/es/news/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026"},{"api_url":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026?lang=de","language":"de","url":"https://newsverum.com/de/news/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026"},{"api_url":"https://newsverum.com/api/v1/articles/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026?lang=pt","language":"pt","url":"https://newsverum.com/pt/news/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026"}],"url":"https://newsverum.com/en/news/japan-freshwater-fish-distribution-survey-finds-range-shifts-2026"},"version":"1"}