Koguna na Japan

Koguna na Japan ana siffanta su da ɗan gajeren tsayinsu da tsayin daka sosai saboda kunkuntar yanayin ƙasar.  Wani abin da aka ambata akai-akai shine 'wannan ba kogi bane, amma ruwa ne' na injiniyan Dutch (o-yatoi gaikokujin) Johannis de Rijke wanda ya ziyarci Kogin Jōganji, lardin Toyama.  Mogami, da Fuji da kuma Kuma ana ɗaukar su a matsayin koguna uku mafi sauri na Japan.

Koguna na yau da kullun na Japan sun tashi daga gandun daji masu tsaunuka kuma sun yanke kwari masu zurfi a saman su, kuma sun samar da filayen alluvial a cikin ƙananan su wanda ke bawa Jafananci damar noma gonakin shinkafa da kafa birane. Yawancin koguna suna da madatsar ruwa don samar da ruwa da wutar lantarki.

Kogin da ya fi tsayi a Japan shine Shinano, wanda ke gudana daga Nagano zuwa Niigata . Tone yana da mafi girman ruwa kuma yana ba da ruwa ga mazauna sama da miliyan 30 na yankin Tokyo.

 Hokkaido 
Akwai koguna 326 a cikin Hokkaido, gami da tsarin kogin aji 13 (1級水系 ko 一級河川, ikkyū suikei) wanda gwamnatin tsakiya ta zaba. Ofishin Ci gaban Yankin Hokkaidō (北海道發展局, ) ne ke gudanar da koguna na aji A. Akwai tsarin kogin aji B guda shida.

Tebur mai zuwa ya lissafa koguna na Hokkaidō ta tsawon. Yi amfani da jigogi na shafi don tsarawa ta suna, aji, ko matsayi na biyan kuɗi.
Sunan koginTsawonƊalibinHaraji naRefsIshikari (石狩川, Ishikari-gawa) A"河川概要 北海道開発局" (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Retrieved December 31, 2017.
Category:CS1 Japanese-language sources (ja)"一級河川水系別延長等" (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism, Japan. Retrieved December 31, 2017.
Category:CS1 Japanese-language sources (ja)"北海道河川一覧図 - 北海道庁" (PDF) (in Japanese). Hokkaido Prefecture. Retrieved December 31, 2017.
Category:CS1 Japanese-language sources (ja)Teshio (天塩川, Teshio-gawa) ATokachi (X勝川, Tokachi-gawa) AKushiro (Shu川, Kushiro-gawa) AYūbari (夕張川, Yūbari-gawa) AIshikariMu (Suwa, Mu-kawa) AShiribetsu (Chiribetsu-gawa) ATokoro (常呂川, Tokoro-gawa) AAbashiri (網走川, Abashiri-gawa) AChitose (千歲川, Chitose-gawa) AIshikariSaru (沙流川, Saru-gawa) AAkan (A寒川, Akan-gawa) BYūbetsu (Fagu別川, Yūbetsu-gawa) AShokotsu (Shay, Shokotsu-gawa) ANiikappu (Sabon冠川, Niikappu-gawa) BShiribeshi-Toshibetsu (bayan haka志利別川, Shiribeshi-Toshibetsu-gawa) AShibetsu (標津川, Shibetsu-gawa) BToyohira (豊平川, Toyohira-gawa) AIshikariShizunai (静内川, Shizunai-gawa) BRumoi (Sai, Rumoi-Ruwa) AKoetoi (Sauce-Sauce, Koetoi-gawa) BMitsuishi (三石川, Mitsuishi-gawa) BShikiu (敷生川, Shikiu-gawa) AMakomanai (真駒內川, Makomanai-gawa) AToyohiraAnano (穴の川, Ana-no-kawa) AToyohira

 Honshu 
An lissafa koguna ta tsawon. Hakanan za'a iya tsara ginshiƙai ta hanyar suna, aji, da matsayi na biyan kuɗi.
River nameLengthClassTributary ofRefsShinano (信濃川, Shinano-gawa)ATone (利根川, Tone-gawa)AKitakami (北上川, Kitakami-gawa)AAbukuma (阿武隈川, Abukuma-gawa)AKiso (木曽川, Kiso-gawa)AMogami (最上川, Mogami-gawa)ATenryū (天竜川, Tenryū-gawa)AAgano (阿賀野川, Agano-gawa)AGōnokawa (江の川 or 江川, -gawa)Enokawa River (可愛川, Eno-kawa)AKumano (熊野川, Kumano-gawa)Shingu River (新宮川, Shingu-gawa)AArakawa (荒川, Arakawa)AŌi (大井川, Ōi-gawa)ANagara (長良川, Nagara-gawa)AHii (斐伊川, Hii-gawa)ANaka (那珂川, Naka-gawa)AYura (由良川, -gawa)AAsahi (旭川, Asahi-gawa)AMabechi (馬淵川, Mabechi-gawa)ATama (多摩川, Tama-gawa)AKinokawa (紀ノ川 or 紀の川)Yoshino River (吉野川, Yoshino-kawa)AYoneshiro (米代川, Yoneshiro-gawa)AOmono (雄物川, Omono-gawa)AYoshii (吉井川, Yoshii-gawa)AFuji (富士川, Fuji-kawa)AKuji (久慈川, Kuji-gawa)AIbi (揖斐川, Ibi-gawa)AJinzū (神通川, Jinzū-gawa)AYahagi (矢作川, Yahagi-gawa)AKuzuryū (九頭竜川, Kuzuryū-gawa)AShō (庄川, Shō-gawa)ATakahashi (高梁川, Takahashi-gawa)ASagami (相模川, Sagami-gawa)AKatsura (桂川, Katsura-gawa)Ōi River (大堰川, Ōi-gawa)AYodoŌta (太田川, Ōta-gawa)AIwaki (岩木川, Iwaki-gawa)AKizu (木津川, Kizu-gawa)AYodoKako (加古川, Kako-gawa)AShōnai (庄内川, Shōnai-gawa)AMiya (宮川, Miya-gawa)ANaruse (鳴瀬川, Naruse-gawa)AAshida (芦田川, Ashida-gawa)AKurobe (黒部川, Kurobe-gawa)AKushida (櫛田川, Kushida-gawa)ATakatsu (高津川, Takatsu-gawa)AHino (日野川, Hino-gawa)AToyo (豊川, Toyo-gawa)AYodo (淀川, Yodo-gawa)Seta River (瀬田川, Seta-gawa)Uji River (宇治川, Uji-gawa)AAra (荒川, Ara-kawa)ATedori (手取川, Tedori-gawa)AAka (赤川, Aka-gawa)AIbo (揖保川, Ibo-gawa)AMaruyama (円山川, Maruyama-gawa)AOyabe (小矢部川, Oyabe-gawa)AYamato (大和川, Yamato-gawa)AOirase (奥入瀬川, Oirase-gawa)BMuko (武庫川, Muko-gawa)AYasu (野洲川, Yasu-gawa)AYodoSeki (関川, -gawa)ATakase (高瀬川, Takase-gawa)AKoyoshi (子吉川, Koyoshi-gawa)AHime (姫川, Hime-gawa)AEdo (江戸川, Edo-gawa)AToneOze (小瀬川, Oze-gawa)Kono River (木野川, Kono-gawa)ASaba (佐波川, Saba-gawa)AJōganji (常願寺川, Jōganji-gawa)AKumozu (雲出川, Kumozu-gawa)ANatori (名取川, Natori-gawa)AAbe (安倍川, Abe-kawa)ASendai (千代川, Sendai-gawa)AKano (狩野川, Kano-gawa)ASakawa (酒匂川, Sakawa-gawa)AKakehashi (梯川, Kakehashi-gawa)ASuzuka (鈴鹿川, Suzuka-gawa)ATenjin (天神川, Tenjin-gawa)AKamo (鴨川, Kamo-gawa)AYodoKita (北川, Kita-gawa)AKiku (菊川, Kiku-gawa)AKanda (神田川, Kanda-gawa)AArakawaKibishima (Kibishima-gawa)ASumida (隅田川, Sumida-gawa)AArakawaTsurumi (鶴見川, Tsurumi-gawa)AAikawa (相川, Aikawa -gawa)BDōtonbori (道頓堀)AYodo