Ibi Kogen

(500 m — 800 m)

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中腹の観測所 650 m
3900 m	3850 m	3900 m	4500 m	4450 m

Ibukiyama

(435 m — 855 m)

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中腹の観測所 645 m
3950 m	3850 m	3900 m	4500 m	4400 m

Iizuna Kogen

(1080 m — 1480 m)

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中腹の観測所 1280 m
3750 m	3700 m	3750 m	4300 m	4150 m

Iizuna Resort

(900 m — 1500 m)

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中腹の観測所 1200 m
3750 m	3700 m	3750 m	4250 m	4150 m

Ikawa Kainayama

(1095 m — 1185 m)

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中腹の観測所 1140 m
4300 m	4200 m	4450 m	4800 m	4800 m

Ikenotaira Onsen Alpenblick

(800 m — 1500 m)

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中腹の観測所 1150 m
3750 m	3700 m	3700 m	4200 m	4100 m

Ikenotaira Snow Park

(1425 m — 1495 m)

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中腹の観測所 1460 m
3950 m	3700 m	3800 m	4400 m	4300 m

Imabetsu Choei

(5 m — 80 m)

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中腹の観測所 42 m
3050 m	3000 m	3350 m	3650 m	3400 m

Imajo 365

(430 m — 760 m)

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中腹の観測所 595 m
3900 m	3900 m	3900 m	4500 m	4350 m

Imakane-cho Pilika

(133 m — 410 m)

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中腹の観測所 272 m
3050 m	2800 m	3200 m	3500 m	3200 m

Ina Ski Resort

(876 m — 1086 m)

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中腹の観測所 981 m
4000 m	3800 m	3850 m	4400 m	4350 m

Inawashiro Resort

(760 m — 1200 m)

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中腹の観測所 980 m
3750 m	3500 m	3550 m	4050 m	3900 m

Inawashiro Ski

(675 m — 1255 m)

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中腹の観測所 965 m
3750 m	3500 m	3600 m	4050 m	3950 m

Iox-Arosa

(350 m — 850 m)

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中腹の観測所 600 m
3750 m	3700 m	3700 m	4400 m	4200 m

Ipponsugi

(440 m — 470 m)

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中腹の観測所 455 m
3750 m	3650 m	3700 m	4200 m	4100 m

Ishikari Heigen

(20 m — 126 m)

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中腹の観測所 73 m
2950 m	2750 m	3100 m	3350 m	3050 m

Ishiuchi Hanaoka

(280 m — 405 m)

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中腹の観測所 342 m
3750 m	3650 m	3700 m	4150 m	4050 m

Ishiuchi Maruyama

(256 m — 920 m)

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中腹の観測所 588 m
3750 m	3650 m	3700 m	4150 m	4050 m

Ishizuchi

(1250 m — 1400 m)

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中腹の観測所 1325 m
4300 m	4250 m	4600 m	4800 m	4800 m

Isshiki Kokusai

(1000 m — 1200 m)

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中腹の観測所 1100 m
3900 m	3750 m	3800 m	4400 m	4250 m

Itoigawa Seaside Valley

(240 m — 740 m)

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中腹の観測所 490 m
3800 m	3700 m	3700 m	4200 m	4100 m

Itoshiro Charot Town

(650 m — 850 m)

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中腹の観測所 750 m
3800 m	3800 m	3800 m	4450 m	4250 m

Itsukamachi

(160 m — 500 m)

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中腹の観測所 330 m
3800 m	3650 m	3650 m	4150 m	3950 m

Iwakisan Hyakuzawa

(346 m — 784 m)

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中腹の観測所 565 m
3200 m	3050 m	3350 m	3750 m	3550 m

Iwanai Resort

(365 m — 1164 m)

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中腹の観測所 764 m
3000 m	2750 m	3100 m	3400 m	3150 m

Iwappara

(400 m — 985 m)

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中腹の観測所 692 m
3750 m	3650 m	3700 m	4200 m	4100 m

Izumi Kogen Spring Valley

(687 m — 959 m)

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中腹の観測所 823 m
3550 m	3400 m	3400 m	3900 m	3900 m

Izumigatake

(600 m — 850 m)

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中腹の観測所 725 m
3600 m	3400 m	3400 m	3900 m	3900 m

Jeunesse Kurikoma

(395 m — 770 m)

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中腹の観測所 582 m
3600 m	3300 m	3350 m	3900 m	3700 m

Jibuzaka Kogen

(1160 m — 1350 m)

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中腹の観測所 1255 m
3900 m	3900 m	3950 m	4500 m	4450 m

Jigatake

(940 m — 1200 m)

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中腹の観測所 1070 m
3800 m	3700 m	3800 m	4300 m	4200 m

Joetsu Kokusai

(200 m — 1017 m)

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中腹の観測所 608 m
3750 m	3650 m	3700 m	4150 m	4050 m