Where is the longest river in Japan?

River ranking of Japan

Where is the longest river in Japan?
The longest river in Japan is Shinano River, and is 367 km. And it continues with Tonegawa and Ishikari River.
Moreover, in the valley area of a river, Tonegawa is No.1 of Japan. The area measures 16842 km2.

River ranking of Japan (length ranking of a river)
Ranking	River name	Length (km)	Valley area (km2)
3	Shinano River	367	11900
1	Tone River	322	16842
2	Ishikari River	268	14330
10	Teshio River	256	5590
4	Kitakami River	249	10150
11	Abukuma River	239	5400
5	Kiso River	229	9100
9	Mogami River	229	7040
12	Tenryuu River	213	5090
8	Agano River	210	7710
28	Watari River	196	2270
16	Gono River	194	3900
17	Yoshino River	194	3750
27	Shingu River	183	2360
19	Ara River	173	2940
6	Tokachi River	156	9010
26	Kushiro River	154	2510
24	Hii River	153	2540
18	Naka River	150	3270
33	Yura River	146	1880
21	Chikugo River	143	2863
31	Mabuchi River	142	2050
37	Asahi River	142	1810
43	Sendai River	137	1600
14	Yoneshiro River	136	4100
38	Kino River	136	1750
13	Omono River	133	4710
30	Yoshii River	133	2110
15	Fuji River	128	3990
42	Shiribetsu River	126	1640
44	Niyodo River	124	1560
22	Jintsu River	120	2720
32	Tokoro River	120	1930
35	Yahagi River	118	1830
20	Kuzuryu River	116	2930
34	Kuma River	115	1880
23	Takahashi River	111	2670
41	Sagami River	109	1680
29	Oyodo River	107	2230
36	Gokase River	106	1820
40	Ota River	103	1710
25	Iwaki River	102	2540
39	Kako River	96	1730
7	Yodo River	75	8240
Data Ministry of Land, Infrastructure, Transport and Tourism