Editing Geography of Japan (section)

===Rivers===
[[File:NiigataCityOpenData machinami004.jpg|thumb|[[Shinano River]] in Niigata City]]
{{main|List of rivers of Japan}}

Rivers are generally steep and swift, and few are suitable for navigation except in their lower reaches. Although most rivers are less than {{convert|300|km|mi|abbr=on}} in length, their rapid flow from the mountains is what provides [[Hydroelectricity in Japan|hydroelectric power]].<ref name=loc/> Seasonal variations in flow have led to the extensive development of flood control measures.<ref name=loc/> The longest, the [[Shinano River]], which winds through [[Nagano Prefecture]] to [[Niigata Prefecture]] and flows into the Sea of Japan, is {{convert|367|km|mi|abbr=on}} long.<ref name=loc/><ref name="longest-rivers"/>

These are the 10 longest rivers of Japan.<ref name="longest-rivers">{{cite web |title=Longest Rivers In Japan |format=website |url=https://www.worldatlas.com/articles/the-longest-rivers-in-japan.html |archive-url=https://web.archive.org/web/20181117105043/https://www.worldatlas.com/articles/the-longest-rivers-in-japan.html |archive-date = November 17, 2018 |publisher=WorldAtlas.com | access-date = 9 February 2020}}</ref>

{| class="wikitable sortable"
! class="unsortable"|Rank
!Name
!Region
!Prefecture
!Length
(km)
|-
|1
|[[Shinano River|Shinano]]
|[[Hokuriku region|Hokuriku]]
|[[Nagano Prefecture|Nagano]], [[Niigata Prefecture|Niigata]]
|367
|-
|2
|[[Tone River|Tone]]
|[[Kantō region|Kantō]]
|[[Saitama Prefecture|Saitama]], [[Chiba Prefecture|Chiba]], [[Ibaraki Prefecture|Ibaraki]], [[Tochigi Prefecture|Tochigi]], [[Gunma Prefecture|Gunma]]
|322
|-
|3
|[[Ishikari River|Ishikari]]
|[[Hokkaido]]
|[[Hokkaido]]
|268
|-
|4
|[[Teshio River|Teshio]]
|[[Hokkaido]]
|[[Hokkaido]]
|256
|-
|5
|[[Kitakami River|Kitakami]]
|[[Tōhoku Region|Tōhoku]]
|[[Iwate Prefecture|Iwate]], [[Miyagi Prefecture|Miyagi]]
|249
|-
|6
|[[Abukuma River|Abukuma]]
|[[Tōhoku region|Tōhoku]]
|[[Fukushima Prefecture|Fukushima]], [[Miyagi Prefecture|Miyagi]]
|239
|-
|7
|[[Mogami River|Mogami]]
|[[Tōhoku region|Tōhoku]]
|[[Yamagata Prefecture|Yamagata]]
|229
|-
|8
|[[Tenryū River|Tenryu]]
|[[Chūbu region|Chūbu]]
|[[Nagano Prefecture|Nagano]], [[Aichi Prefecture|Aichi]], [[Shizuoka Prefecture|Shizuoka]]
|212
|-
|9
|[[Agano River|Agano]]
|[[Hokuriku region|Hokuriku]]
|[[Niigata Prefecture|Niigata]]
|210
|-
|10
|[[Shimanto River|Shimanto]]
|[[Shikoku]]
|[[Kōchi Prefecture|Kōchi]]
|196
|}