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Japanese Prefectures By ISO

Guess the prefectures of Japan in order of their International Organization of Standardization codes.
Here's a hint; their ISO numbers are generally ordered from north to south.
Populations estimated for 2025.
Quiz by
AwesomePotato170
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Last updated: July 22, 2025
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First submittedJuly 22, 2025
Times taken17
Average score85.1%
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ISO
Region
Population
Answer
JP-01
Itself
4,991,000
Hokkaidō
JP-02
Tohoku
1,144,000
Aomori
JP-03
Tohoku
1,126,000
Iwate
JP-04
Tohoku
2,229,000
Miyagi
JP-05
Tohoku
880,000
Akita
JP-06
Tohoku
995,000
Yamagata
JP-07
Tohoku
1,718,000
Fukushima
JP-08
Kanto
2,787,000
Ibaraki
JP-09
Kanto
1,873,000
Tochigi
JP-10
Kanto
1,879,000
Gunma
JP-11
Kanto
7,329,000
Saitama
JP-12
Kanto
6,244,000
Chiba
JP-13
Kanto
14,284,000
Tōkyō
JP-14
Kanto
9,220,000
Kanagawa
JP-15
Chubu
2,071,000
Niigata
JP-16
Chubu
987,000
Toyama
JP-17
Chubu
1,087,000
Ishikawa
JP-18
Chubu
732,000
Fukui
JP-19
Chubu
785,000
Yamanashi
JP-20
Chubu
1,969,000
Nagano
JP-21
Chubu
1,902,000
Gifu
JP-22
Chubu
3,498,000
Shizuoka
JP-23
Chubu
7,445,000
Aichi
JP-24
Kansai
1,694,000
Mie
JP-25
Kansai
1,398,000
Shiga
JP-26
Kansai
2,505,000
Kyōto
JP-27
Kansai
8,751,000
Ōsaka
JP-28
Kansai
5,303,000
Hyōgo
JP-29
Kansai
1,274,000
Nara
JP-30
Kansai
867,000
Wakayama
JP-31
Chugoku
524,000
Tottori
JP-32
Chugoku
633,000
Shimane
JP-33
Chugoku
1,814,000
Okayama
JP-34
Chugoku
2,690,000
Hiroshima
JP-35
Chugoku
1,264,000
Yamaguchi
JP-36
Shikoku
675,000
Tokushima
JP-37
Shikoku
908,000
Kagawa
JP-38
Shikoku
1,260,000
Ehime
JP-39
Shikoku
645,000
Kōchi
JP-40
Kyushu & Okinawa
5,078,000
Fukuoka
JP-41
Kyushu & Okinawa
781,000
Saga
JP-42
Kyushu & Okinawa
1,236,000
Nagasaki
JP-43
Kyushu & Okinawa
1,686,000
Kumamoto
JP-44
Kyushu & Okinawa
1,073,000
Ōita
JP-45
Kyushu & Okinawa
1,023,000
Miyazaki
JP-46
Kyushu & Okinawa
1,515,000
Kagoshima
JP-47
Kyushu & Okinawa
1,464,000
Okinawa
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