Redone Japan house of representatives seats

[President Punxsutawney Phil]

what would the districts for the Japan House of Representatives look like drawn on a one-man-one-vote basis, with prefectures serving as invioliable sub-units? Let's say there is 300 FPTP seats.

[President Punxsutawney Phil]

https://bit.ly/2E0Emco
here are OTL districts, by comparison.

[Oryxslayer]

I have to assume that there would be at minimum 1.5 seats in the Tokyo metro area for every current seat, it's that badly apportioned. Beyond that, I have no idea without a detailed map.


Also, shorten that link.

[President Punxsutawney Phil]

prefecture>2015 census population>current district allotment>OMOV district allotment
Aichi 7,484,094 (15>18)
Akita 1,022,839 (3>2)
Aomori 1,308,649 (3>3)
Chiba 6,224,027 (13>15)
Ehime 1,385,840 (4>3)
Fukui 787,099 (2>2)
Fukuoka 5,102,871 (11>12)
Fukushima 1,913,606 (5>4)
Gifu 2,032,533 (5>5)
Gunma 1,973,476 (5>5)
Hiroshima 2,844,963 (7>7)
Hokkaido 5,383,579 (12>13)
Hyogo 5,536,989 (12>13)
Ibaraki 2,917,857 (7>7)
Ishikawa 1,154,343 (3>3)
Iwate 1,279,814 (3>3)
Kagawa 976,756 (3>2)
Kagoshima 1,648,752 (4>4)
Kanagawa 9,127,323 (18>22)
Kochi 728,461 (2>2)
Kumamoto 1,786,969 (4>4)
Kyoto 2,610,140 (6>6)
Mie 1,815,827 (4>4)
Miyagi 2,334,215 (6>5)
Miyazaki 1,104,377 (3>3)
Nagano 2,099,759 (5>5)
Nagasaki 1,377,780 (4>3)
Nara 1,365,008 (3>3)
Niigata 2,305,098 (6>5)
Oita 1,166,729 (3>3)
Okayama 1,922,181 (5>5)
Okinawa 1,434,138 (4>3)
Osaka 8,838,908 (19>21)
Saga 833,245 (2>2)
Saitama 7,261,271 (15>17)
Shiga 1,413,184 (4>3)
Shimane 694,188 (3>2)
Shizuoka 3,701,181 (8>9)
Tochigi 1,974,671 (5>5)
Tokushima 756,063 (2>2)
Tokyo 13,513,734 (25>32)
Tottori 573,648 (2>1)
Toyama 1,066,883 (3>2)
Wakayama 963,850 (3>2)
Yamagata 1,122,957 (3>3)
Yamaguchi 1,405,007 (4>3)
Yamanashi 835,165 (2>2)
total: 127,110,047
423,700 per district, if 300 seats

(my method was, population/quota, then round to nearest number, and then add or remove seats to get desired total seat count)

[President Punxsutawney Phil]

I have to assume that there would be at minimum 1.5 seats in the Tokyo metro area for every current seat, it's that badly apportioned. Beyond that, I have no idea without a detailed map.


Also, shorten that link.

Guess it's inevitable Tottori drops to one seat?

[Tintrlvr]

I have to assume that there would be at minimum 1.5 seats in the Tokyo metro area for every current seat, it's that badly apportioned. Beyond that, I have no idea without a detailed map.


Also, shorten that link.

Guess it's inevitable Tottori drops to one seat?

You could add a bunch of seats instead. If you had 300k people per seat as a target, I think Tottori would keep its second seat.

[President Punxsutawney Phil]

I have to assume that there would be at minimum 1.5 seats in the Tokyo metro area for every current seat, it's that badly apportioned. Beyond that, I have no idea without a detailed map.


Also, shorten that link.

Guess it's inevitable Tottori drops to one seat?

You could add a bunch of seats instead. If you had 300k people per seat as a target, I think Tottori would keep its second seat.

that would make for 424 seats. 176 PR block seats (like now) makes for 600.
An interesting solution that hadn't crossed my mind!
though diluting the PR block element isn't ideal, and increasing the size of the House to 700 would be unwieldy. House membership could be fixed to 650. Keeping the same share of PR block seats means 255 PR block and 395 single-member. 395 single-member=quota of 321,798.

[President Punxsutawney Phil]

Aichi 7,484,094 (23)
Akita 1,022,839 (3)
Aomori 1,308,649 (4)
Chiba 6,224,027 (19)
Ehime 1,385,840 (4)
Fukui 787,099 (3)
Fukuoka 5,102,871 (16)
Fukushima 1,913,606 (6)
Gifu 2,032,533 (6)
Gunma 1,973,476 (6)
Hiroshima 2,844,963 (9)
Hokkaido 5,383,579 (17)
Hyogo 5,536,989 (17)
Ibaraki 2,917,857 (9)
Ishikawa 1,154,343 (4)
Iwate 1,279,814 (4)
Kagawa 976,756 (3)
Kagoshima 1,648,752 (5)
Kanagawa 9,127,323 (29)
Kochi 728,461 (2)
Kumamoto 1,786,969 (6)
Kyoto 2,610,140 (8)
Mie 1,815,827 (6)
Miyagi 2,334,215 (7)
Miyazaki 1,104,377 (4)
Nagano 2,099,759 (7)
Nagasaki 1,377,780 (4)
Nara 1,365,008 (4)
Niigata 2,305,098 (7)
Oita 1,166,729 (4)
Okayama 1,922,181 (6)
Okinawa 1,434,138 (5)
Osaka 8,838,908 (28)
Saga 833,245 (3)
Saitama 7,261,271 (23)
Shiga 1,413,184 (5)
Shimane 694,188 (2)
Shizuoka 3,701,181 (12)
Tochigi 1,974,671 (6)
Tokushima 756,063 (2)
Tokyo 13,513,734 (42)
Tottori 573,648 (2)
Toyama 1,066,883 (3)
Wakayama 963,850 (3)
Yamagata 1,122,957 (4)
Yamaguchi 1,405,007 (5)
Yamanashi 835,165 (3)
total: 127,110,047
321,798 per district, if 395 seats

[President Punxsutawney Phil]

I'm assuming that you would also use that population quota to distribute the Block PR seats too?

the same total population would be used to apportion block PR seats, but the quota would be higher by default, because there are less PR seats.

[Lachi]

For the 255 PR seats you specified, I got these seat numbers:
QUOTA: 496,753

北海道: 9
東北: 15
北関東: 24
南関東: 27
東京: 22
北陸信越: 13
東海: 25
近畿: 35
中国: 12
四国: 7
九州: 24
Block total: 213
New nationwide PR block: 42

[President Punxsutawney Phil]

Hokkaido-1: Hakodate, Kayabe district, Kameda district
Hokkaido-2: the rest of Oshima subprefecture, Hiyama subprefecture, all of Oshima subprefecture bar the city of Otaru
Hokkaido-3: all of Iburi subprefecture bar the eastern half of Tomokomai and everything east of it
Hokkaido-4: Otaru city, Teine ward and part of Nishi ward in Sapporo
Hokkaido-5: most of Nishi and all of Minami ward in Sapporo
Hokkaido-6: Kita ward in Sapporo
Hokkaido-7: Chou ward and the western part of Higashi ward in Sapporo
Hokkaido-8: the rest of Higashi ward and most of Shiroishi ward in Sapporo
Hokkaido-9: Toyohira and Kita wards in Sapporo, and Ebetsu city
Hokkaido-10: Kitahiroshima, Chitose, and Eniwa cities, and the rest of Iburi subprefecture
Hokkaido-11: the rest of Ishikari subprefecture, Rumoi subprefecture, Soya subprefecture, Nakagawa district, and Horokanai, Fukugawa, Numata, Horukyu, Uryu, Shintotsukawa, Urausu, Tsukigata
Hokkaido-12: the rest of Sorachi subprefecture
Hokkaido-13: most of the city of Asahikawa
Hokkaido-14: Hidaka subprefecture, and the rest of Kamikawa subprefecture
Hokkaido-15: Okhotsk subprefecture
Hokkaido-16: Nemuro and Kushiro subprefectures
Hokkaido-17: Tokachi subprefecture

[President Punxsutawney Phil]

Aomori-1: most of the city of Aomori, Kuroishi city, Hirakawa city, Minamitsugaru district
Aomori-2: Shimokita district, Mutsu city, Misawa city, Kamikata district, Hiranai town, parts of eastern Aomori city
Aomori-3: Hachinohe city, Towada city, Sannohe district
Aomori-4: the rest of Aomori Preferecture

[President Punxsutawney Phil]

Akita-1: the cities of Akita and Katagami
Akita-2: Daisen and everything south of it
Akita-3: the rest of Akita Preferecture

[President Punxsutawney Phil]

Iwate-1: Ichinoseki city, Hiraizumi town, Kitakami city, Hanamaki city, Nishiwaga town Iwate-2: Morioka city
Iwate-3: the three towns (and the sole village) bordering Morioka to the south, as well as everything north of Noda and Iwaizumi
Iwate-4: the rest of Iwate Preferecture

[President Punxsutawney Phil]

Miyagi-1: Kesennuma city, Minamisanriku town, Onagawa town, Ishinomaki city, Tome city, Higashimatsushima city
Miyagi-2: Kurihara city, Osaki city, Toda district, Kami district, Kurakawa district, Matsushima town
Miyagi-3: the rest of Miyagi district, Shiogama city, Tagajo city, two-thirds of Miyagano ward in Sendai
Miyagi-4: Taihaku ward and part of Aoba ward in Sendai
Miyagi-5: part of Aoba ward and half of Izumo ward in Sendai
Miyagi-6: the rest of Izumo and Miyagano wards, and all of Wakayabashi ward, in Sendai
Miyagi-7: all of Miyagi south of Sendai

[President Punxsutawney Phil]

Yamagata-1: the cities of Kaminoyama and Yamagata
Yamagata-2: Yonezawa city, Nanyo city, Nagai city, Higashiokitama district, Nishiokitama district, Higashimurayama district, Nishimurayama district, Sagae city
Yamagata-3: Tendo city, Higashine city, Murayama city, Obanazawa city, Mogami district, Shinjo city
Yamagata-4: the rest of Yamagata preferecture

[President Punxsutawney Phil]

Fukushima-1: Aizu region
Fukushima-2: Fukushima city, Date district sans Kawamata, part of Date city
Fukushima-3: Part of Date city, Soma city, Soma district, Minamisoma city, Kawatama town, Nihonmatsu city, Motomiya city, Otama village
Fukushima-4: Koriyama city
Fukushima-5: Sukugawa city, Shirakawa city, Iwase district, Nishishirakawa district, Higashishirakawa district, Ishikawa district, Tamura city, Tamura district, Futaba district
Fukushima-6: Iwaki city

[President Punxsutawney Phil]

Niigata-1: Murakami city, Iwafune district, Tainai city, Kita ward and half of Konan ward in Niigata
Niigata-2: Chuo and Higashi wards in Niigata
Niigata-3: the rest of Niigata city
Niigata-4: Agano city, Aga town, Gosen city, Tagami town, Kamo city, Sanjo city, Tsubame city, Yahiko village
Niigata-5: Mitsuke city, Nagaoka city bar its enclave to the south
Niigata-6: Niigata city, Myoko city, Sado island, Itoigawa city
Niigata-7: the rest of Niigata preferecture

[President Punxsutawney Phil]

Tochigi-1: Sano city, Ashikaga city, some areas in NE Tochigi city
Tochigi-2: most of Tochigi city, Nogi town, Oyama city
Tochigi-3: Nikko city, Kanuma city, Nasu town, Shioya town, Nasushiobara city
Tochigi-4: Yaita city, Otawara city, Nakagawa town, Sakura city, Nasukarasuyama city, Haga district, Takanezawa town
Tochigi-5: northern half of Utsunomiya
Tochigi-6: the rest of Tochigi preferecture

[President Punxsutawney Phil]

Ibaraki-1: Kitaibaraki city, Takahagi city, Hitachi city, Daigo town, Hitachiōta city
Ibaraki-2: Hitachiōmiya city, Naka city, Tokai village, Hitachinaka city
Ibaraki-3: Mito city, Higashiibaraki district
Ibaraki-4: Kasama city, Sakuragawa city, Chikusei city, Yuki city, Yuki district, Shimotsuma city
Ibaraki-5: Koga city, Goka town, Sakai town, Bando city, Joso city, half of Moriya city
Ibaraki-6: Kamisu city, Kashima city, Itako city, Hokota city, Namegata city, Omitama city
Ibaraki-7: Ishioka city, Kasumigaura city, Tsuchiura city, Ami town, Miho town
Ibaraki-8: Inashiki city, Kawachi town, Ushiku city, Ryūgasaki city, Tone town, half of Toride city
Ibaraki-9: the rest of Ibaraki preferecture

[President Punxsutawney Phil]

For the 255 PR seats you specified, I got these seat numbers:
QUOTA: 496,753

北海道: 9
東北: 15
北関東: 24
南関東: 27
東京: 22
北陸信越: 13
東海: 25
近畿: 35
中国: 12
四国: 7
九州: 24
Block total: 213
New nationwide PR block: 42

I'd rather construct a new set of PR block seats, though that is less important than the FPTP seats and ought to be done later.
Here's a map so far.

[President Punxsutawney Phil]

Gunma-1: Tatebayashi city, Ora district, two-thirds of Ota city
Gunma-2: Kiryu city, Midori city, the rest of Ota, Numata city, Tone district
Gunma-3: Maebashi city
Gunma-4: Isesaki city, Tamamura town, some eastern areas of Takasaki city
Gunma-5: the rest of Takasaki city, bar the far western portion
Gunma-6: the rest of Gunma preferecture

[Lachi]

What I was thinking was using the existing 8 geographical regions for PR, rather than create 11 separate blocks.

[President Punxsutawney Phil]

What I was thinking was using the existing 8 geographical regions for PR, rather than create 11 separate blocks.

that's a decent start.
the way I would do it is to use the regions as a base. If they would be bigger than 28 seats, they would be split, but otherwise they are kept whole.
I would avoid a nation-wide PR block. The existing system doesn't have it - and there isn't enough PR seats that the PR block constituencies get unworkably big.

[President Punxsutawney Phil]

Chiba-1: Noda city, Nagareyama city
Chiba-2: Abiko city, the northern parts of Kashiwa city
Chiba-3: southern parts of Kashiwa city, eastern parts of Matsuda city
Chiba-4: the rest of Matsuda city
Chiba-5: Urayasu city, southern Ishikawa city
Chiba-6: northern Ishikawa city
Chiba-7: Kamagaya city, Shiroi city, northern Funabashi city
Chiba-8: central Funabashi city
Chiba-9: southern Funabashi city, Narashino city
Chiba-10: Hanamigawa and Mihama wards in Chiba city
Chiba-11: Inage and Wakaba wards in Chiba city
Chiba-12: Chuo and Midori wards in Chiba city
Chiba-13: Yotsukaido city, Yachiyo city, western Sakura city
Chiba-14: the rest of Sakura city, Inba district, Yachimata city, Inzai city
Chiba-15: half of Narita city, Asahi city, Choshi city, Katori district, Katori city, Sosa city
Chiba-16: half of Narita city, Tomisato city, Sanmu city, Togane city, Sanbu district
Chiba-17: Ichihara city, Sodegaura city
Chiba-18: Kisirazu city, the northern half of Kimitsu city, Futtsu city, Kyonan town, Minamiboso city, Tayetama city
Chiba-19: the rest of Chiba preferecture