J-RISQ Report

Estimated I_s for Major Cities

Max. Obs. I_s	Histogram of Estimated I_s 1 2 3 4 5- 5+ 6- 6+ 7	Municipality Show All Data	Nighttime Population	Distance [km]
5+		Urahoro,Tokachi,Hokkaido	4,900	51
5-		Niikappu,Niikappu,Hokkaido	5,600	69
5-		Toyokoro,Nakagawa,Hokkaido	3,200	39
5-		Taiki,Hiro,Hokkaido	5,700	18
4		Atsuma,Yufutsu,Hokkaido	4,800	101
4		Hombetsu,Nakagawa,Hokkaido	7,400	71
4		Biratori,Saru,Hokkaido	5,300	79
4		Obihiro,Hokkaido	170,000	37
4		Shintoku,Kamikawa,Hokkaido	6,300	57
4		Abira,Yufutsu,Hokkaido	8,200	106
4		Hiro,Hiro,Hokkaido	7,000	38
4		Kushiro,Hokkaido	170,000	112
4		Shiranuka,Shiranuka,Hokkaido	8,100	88
4		Mikasa,Hokkaido	9,000	123
4		Urakawa,Urakawa,Hokkaido	13,000	55
4		Shinhidaka,Hidaka,Hokkaido	23,000	66
4		Hakodate,Hokkaido	270,000	216
4		Mukawa,Yufutsu,Hokkaido	8,600	96
4		Ikeda,Nakagawa,Hokkaido	6,900	46
4		Ashoro,Ashoro,Hokkaido	6,900	80
4		Kiyota,Sapporo,Hokkaido	110,000	142
4		Makubetsu,Nakagawa,Hokkaido	27,000	40
4		Hidaka,Saru,Hokkaido	12,000	85
4		Chitose,Hokkaido	96,000	121
4		Memuro,Kasai,Hokkaido	19,000	35
4		Shiraoi,Shiraoi,Hokkaido	18,000	143
4		Kuriyama,Yubari,Hokkaido	12,000	119
4		Shikaoi,Kato,Hokkaido	5,500	56
4		Sarabetsu,Kasai,Hokkaido	3,200	9
4		Tsurui,Akan,Hokkaido	2,500	121
4		Hashikami,Sannohe,Aomori	14,000	268
4		Shinshinotsu,Ishikari,Hokkaido	3,300	137
4		Nakasatsunai,Kasai,Hokkaido	4,000	11
4		Tobetsu,Ishikari,Hokkaido	17,000	146
4		Muroran,Hokkaido	88,000	177
4		Rikubetsu,Ashoro,Hokkaido	2,500	110
3		Noheji,Kamikita,Aomori	13,000	252
3		Samani,Samani,Hokkaido	4,500	54
3		Kita,Sapporo,Hokkaido	290,000	153
3		Otofuke,Kato,Hokkaido	44,000	44
3		Bibai,Hokkaido	23,000	130
3		Naganuma,Yubari,Hokkaido	11,000	123
3		Higashidori,Shimokita,Aomori	6,600	207
3		Nakafurano,Sorachi,Hokkaido	5,100	105
3		Shingo,Sannohe,Aomori	2,400	286
3		Oketo,Tokoro,Hokkaido	3,100	126
3		Minamifurano,Sorachi,Hokkaido	2,600	76
3		Higashi,Sapporo,Hokkaido	260,000	151
3		Tomakomai,Hokkaido	170,000	122
3		Atsubetsu,Sapporo,Hokkaido	130,000	141
3		Shimizu,Kamikawa,Hokkaido	9,600	49
3		Namporo,Sorachi,Hokkaido	7,900	129
3		Kamishihoro,Kato,Hokkaido	4,800	72
3		Mutsu,Aomori	59,000	215
3		Ebetsu,Hokkaido	120,000	139
3		Betsukai,Notsuke,Hokkaido	15,000	186
3		Shibecha,Kawakami,Hokkaido	7,700	144
3		Shihoro,Kato,Hokkaido	6,100	64
3		Iwamizawa,Hokkaido	85,000	127
3		Shichinohe,Kamikita,Aomori	16,000	261
3		Nemuro,Hokkaido	27,000	217
3		Kitahiroshima,Hokkaido	60,000	132
3		Misawa,Aomori	40,000	257
3		Shimukappu,Yufutsu,Hokkaido	1,200	71
3		Hachinohe,Aomori	230,000	267
3		Shiroishi,Sapporo,Hokkaido	210,000	147
3		Oma,Shimokita,Aomori	5,200	216
3		Tsukigata,Kabato,Hokkaido	4,500	142
3		Morioka,Iwate	300,000	360
3		Gonohe,Sannohe,Aomori	17,000	274
3		Teshikaga,Kawakami,Hokkaido	7,800	147
3		Noboribetsu,Hokkaido	50,000	165
3		Kitami,Hokkaido	120,000	149
3		Ishikari,Hokkaido	57,000	159
3		Oirase,Kamikita,Aomori	24,000	263
3		Nambu,Sannohe,Aomori	18,000	276
3		Karumai,Kunohe,Iwate	9,300	287
3		Hamanaka,Akkeshi,Hokkaido	6,100	173
3		Shibetsu,Shibetsu,Hokkaido	5,200	202
3		Ninohe,Iwate	28,000	298
3		Rokkasho,Kamikita,Aomori	11,000	231
3		Saroma,Tokoro,Hokkaido	5,400	167
3		Hirono,Kunohe,Iwate	17,000	269
3		Teine,Sapporo,Hokkaido	140,000	162
3		Eniwa,Hokkaido	70,000	128
3		Date,Hokkaido	35,000	183
3		Tohoku,Kamikita,Aomori	18,000	258
3		Hiranai,Higashitsugaru,Aomori	11,000	257
3		Sotogahama,Higashitsugaru,Aomori	6,200	267
3		Towada,Aomori	63,000	271
3		Nakashibetsu,Shibetsu,Hokkaido	24,000	185
3		Yokohama,Kamikita,Aomori	4,500	228
3		Yuni,Yubari,Hokkaido	5,400	116
3		Kunohe,Kunohe,Iwate	5,900	300
3		Wassamu,Kamikawa,Hokkaido	3,600	168
3		Furano,Hokkaido	23,000	101
3		Kushiro,Kushiro,Hokkaido	20,000	119
3		Kunneppu,Tokoro,Hokkaido	5,100	135
3		Shikabe,Kayabe,Hokkaido	4,200	198
3		Akaigawa,Yoichi,Hokkaido	1,100	194
3		Kuji,Iwate	36,000	289
3		Yoichi,Yoichi,Hokkaido	20,000	200
3		Engaru,Mombetsu,Hokkaido	21,000	166
3		Erimo,Horoizumi,Hokkaido	4,900	64
3		Sunagawa,Hokkaido	18,000	139
3		Mori,Kayabe,Hokkaido	16,000	214
3		Rokunohe,Kamikita,Aomori	11,000	265
3		Naie,Sorachi,Hokkaido	5,700	135
3		Biei,Kamikawa,Hokkaido	10,000	121
3		Toyohira,Sapporo,Hokkaido	220,000	148
3		Tsugaru,Aomori	33,000	301
3		Kamifurano,Sorachi,Hokkaido	11,000	108
3		Sannohe,Sannohe,Aomori	10,000	290
3		Kaminokuni,Hiyama,Hokkaido	4,900	261
3		Yomogita,Higashitsugaru,Aomori	2,900	271

The histogram shows frequency distribution of estimated I_s derived from interpolation of the observation with 250-m mesh. The daytime and nighttime correspond to 9:00-18:59 and 19:00-8:59, respectively. The distance is measured from the epicenter to the center of the municipality.

Major Historical Damaging Earthquakes in This Region

Year	Region	M	Damage
1915	Off Tokachi	7.0	1 dead, 1 house collapsed.
1952	Off Kushiro	8.2	Tokachi-oki Earthquake,Tsunami with heights of 3m in Hokkaido and 1-2 m on the Sanriku coast. 28 dead, 5 missing, 815 houses collapsed, 1,324 partially destroyed, 91 outflows.
1962	Off Tokachi	7.1	2 building collapses and some minor damage.
1970	Southern Tokachi	6.7	32 injured, 2 houses collapsed, 7 partially destroyed, 139 partially damaged.
1982	Off Urakawa	7.1	Uraga-oki Earthquake,167 injured, 9 buildings collapsed, 16 partially destroyed, 174 partially damaged, 45 railways damaged. A small tsunami was observed.
2003	Off Kushiro	8.0	Tokachi-oki Earthquake,1 dead, 1 missing, 849 injured, 116 houses collapsed, 368 partially destroyed. The maximum S was 6- (9 cities in Hokkaido). A tsunami whose maximum height was 4m hit Hokkaido and the Pacific coast of Honshu.

Reference: National Astronomical Observatory of Japan, Chronological Scientific Tables, Maruzen, (2017) *partially extracted

5- or greater	5+ or greater
6- or greater	6+ or greater Not Available

Updated: 2026-04-27 05:31:07 (UTC+9) Ver.6

I_s Distribution Maximum Observed I_s:5+

Estimated I_s for Major Cities

I_s Exposed-Population Estimates of Each City

Major Historical Damaging Earthquakes in This Region

Seismic Hazard Information of J-SHIS

Show All Data
Show All Data	5- or greater	5+ or greater	6- or greater	6+ or greater
Whole of Japan	20,000	5,000	< 1,000
Hokkaido Prefecture	20,000	5,000	< 1,000
Obihiro,Hokkaido	< 1,000
Tomakomai,Hokkaido	< 1,000
Atsuma,Yufutsu,Hokkaido	< 1,000
Abira,Yufutsu,Hokkaido	< 1,000
Mukawa,Yufutsu,Hokkaido	< 1,000
Hidaka,Saru,Hokkaido	< 1,000
Biratori,Saru,Hokkaido	< 1,000
Niikappu,Niikappu,Hokkaido	2,000
Shinhidaka,Hidaka,Hokkaido	< 1,000
Otofuke,Kato,Hokkaido	< 1,000
Taiki,Hiro,Hokkaido	< 1,000
Hiro,Hiro,Hokkaido	< 1,000
Makubetsu,Nakagawa,Hokkaido	10,000
Toyokoro,Nakagawa,Hokkaido	2,000	< 1,000
Hombetsu,Nakagawa,Hokkaido	< 1,000
Ashoro,Ashoro,Hokkaido	< 1,000
Urahoro,Tokachi,Hokkaido	5,000	5,000	< 1,000

Updated: 2026-04-27 05:31:07 (UTC+9) Ver.6

Is Distribution Maximum Observed Is:5+

Estimated Is for Major Cities

Is Exposed-Population Estimates of Each City

Major Historical Damaging Earthquakes in This Region

Seismic Hazard Information of J-SHIS

I_s Distribution Maximum Observed I_s:5+

Estimated I_s for Major Cities

I_s Exposed-Population Estimates of Each City