Monthly Japanese Light Novel Sales Figures April 2018

Data covers 9th April – 6th May

Sorry, this has been out for quite some time.

Volume ranking:

*1.　170,846　Overlord 13
*2.　141,919　Mahouka Koukou no Rettousei 25
*3.　*65,408　Meitantei Conan: Zero no Shikkounin
*4.　*34,056　Arifureta Shokugyou de Sekai Saikyou 8
*5.　*26,075　Strike the Blood Append 2
*6.　*25,598　One Piece novel A: Speed Kaizokudan Kessei-hen 1
*7.　*23,867　Tondemo Skill de Isekai Hourou Meshi 5
*8.　*20,829　IS <Infinite Stratos> 12
*9.　*20,608　Rakudai Kishi no Cavalry 14
10.　*19,167　Arafoo Kenja no Isekai Seikatsu Nikki 6
11.　*18,598　Seishun Buta Yarou wa Odekake Sister no Yume wo Minai
12.　*18,241　Hachinantte, Sore wa Nai Deshou! 13
13.　*18,216　Sword Art Online Alternative: Gun Gale Online 1
14.　*16,206　Gakusen Toshi Asterisk 14
15.　*16,092　Youheidan no Ryouriban 5
16.　*15,791　Mahouka Koukou no Rettousei 24
17.　*14,984　Heavy Object
18.　*14,767　Re:Zero kara Hajimeru Isekai Seikatsu 16
19.　*14,167　Naruto -Naruto- Naruto Shinden: Oyako no Hi
20.　*13,156　Satsuriku no Tenshi 3

Series ranking:

*1.　224,319　Overlord
*2.　161,866　Mahouka Koukou no Rettousei
*3.　*65,408　Gekijouban Meitantei Conan: Zero no Shikkounin
*4.　*62,635　Sword Art Online Alternative: Gun Gale Online
*5.　*48,503　Arifureta Shokugyou de Sekai Saikyou
*6.　*46,730　Re:Zero kara Hajimeru Isekai Seikatsu
*7.　*30,020　Tondemo Skill de Isekai Hourou Meshi
*8.　*29,233　Sword Art Online
*9.　*27,451　No Game No Life
10.　*27,077　Strike the Blood Append
11.　*25,598　One Piece Novelisation
12.　*23,729　Kono Subarashii Sekai ni Shukufuku wo!
13.　*20,948　Tensei Shitara Slime Datta Ken
14.　*20,829　IS <Infinite Stratos>
15.　*20,670　Hoshi no Kirby Novelisation
16.　*20,608　Rakudai Kishi no Cavalry
17.　*19,906　Ryuuou no Oshigoto!
18.　*19,672　Seishun Buta Yarou Series
19.　*19,167　Arafoo Kenja no Isekai Seikatsu Nikki
20.　*18,967　Gakusen Toshi Asterisk

(Source:Oricon via Refugee-chan)

Last month: March 2018
Next month:

Half-year Japanese light novel sales rankings (first half 2018)

Data covers 20th November 2017 to 20th May 2018

Again with the really limited data. Unlike the full year’s data, though, I wouldn’t be surprised if we don’t ever get the full rankings for this lot…

Volume ranking:

*1.　195,088　Sword Art Online Progressive 005
*2.　192,975　Overlord 13
*3.　160,333　Mahouka Koukou no Rettousei 24
*4.　147,969　Mahouka Koukou no Rettousei 25
*5.　145,393　No Game No Life 10
*6.　132,256　Kono Subarashii Sekai ni Shukufuku wo! 13
*7.　129,333　Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka 13
*8.　112,511　Sword Art Online Progressive 006
*9.　100,188　Kagerou Daze 8 -summer time reload-
10.　*90,307　Re:Zero kara Hajimeru Isekai Seikatsu 15
11.　*88,904　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e 7.5

Series ranking:

*1.　526,840　Overlord
*2.　400,272　Re:Zero kara Hajimeru Isekai Seikatsu
*3.　390,643　Ryuuou no Oshiogoto!
*4.　352,843　Mahouka Koukou no Rettousei
*5.　336,568　Sword Art Online Progressive
*6.　312,899　Kono Subarashii Sekai ni Shukufuku wo!
*7.　271,881　No Game No Life
*8.　238,797　Tensei Shitara Slime Datta Ken
*9.　212,594　Sword Art Online
10.　211,393　Death March kara Hajimaru Isekai Kyousoukyoku

(Source:Oricon)

Monthly Japanese Light Novel Sales Figures March 2018

Data covers 3rd March – 8th April

Volume ranking:

*1.　141,820 Mahouka Koukou no Rettousei 24
*2.　*63,253 Tensei Shitara Slime Datta Ken 12
*3.　*57,414 Re:Zero kara Hajimeru Isekai Seikatsu 16
*4.　*55,419 Ryuuou no Oshigoto! 8
*5.　*46,713 Date A Live 18
*6.　*44,631 No Game No Life 10
*7.　*37,656 Death March kara Hajimaru Isekai Kyousoukyoku 13
*8.　*37,033 Rokudenashi Majutsu Koushi to Akashic Records 13
*9.　*34,539 High School DxD 25
10.　*32,597 Goblin Slayer 7
11.　*28,381 Sword Art Online Progressive 005
12.　*28,142 Bungou Stray Dogs: DEAD APPLE
13.　*27,270 One Piece novel A 1
14.　*23,726 Hai to Gensou no Grimgar level. 12
15.　*23,024 Saenai Heroine no Sodatekata Memorial
16.　*22,103 Goblin Slayer Gaiden: Year One
17.　*21,808 Log Horizon 11
18.　*19,897 Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka 13 RE
19.　*19,857 Hoshi no Kirby: Kessen! Battle Deluxe!!
20.　*19,297 Gakusen Toshi Asterisk 13

Series ranking:

*1.　150,591 Mahouka Koukou no Rettousei
*2.　117,209 Ryuuou no Oshigoto!
*3.　108,564 Re:Zero kara Hajimeru Isekai Seikatsu
*4.　100,135 Overlord
*5.　*93,159 Tensei Shitara Slime Datta Ken
*6.　*78,492 No Game No Life
*7.　*62,885 Death March kara Hajimaru Isekai Kyousoukyoku
*8.　*47,769 Date A Live
*9.　*47,380 Goblin Slayer
10.　*43,246 Rokudenashi Majutsu Koushi to Akashic Records
11.　*38,543 Kono Subarashii Sekai ni Shukufuku wo!
12.　*36,478 Sword Art Online
13.　*35,590 High School DxD
14.　*34,653 Sword Art Online Progressive
15.　*34,300 Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka
16.　*33,867 Hoshi no Kirby novelisation
17.　*28,142 Bungou Stray Dogs: DEAD APPLE
18.　*27,658 Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei shiteshimatta…
19.　*27,270 One Piece Novelisation
20.　*26,846 Eiga Doraemon Nobita no Takarajima

(Source: Oricon via Refugee-chan)

Last month: February 2018
Next month: April 2018

Monthly Japanese Light Novel Sales Figures February 2018

Data covers 5th February – 4th March

Volume ranking:

*1.　154,022 Sword Art Online Progressive 005
*2.　101,671 Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka 13 Regular Edition
*3.　*87,630 No Game No Life 10
*4.　*30,185 Imouto Sae Ireba Ii. 9
*5.　*22,041 Netoge no Yome wa Onna no Ko Janai to Omotta? Lv. 16
*6.　*19,173 Ookami to Koushinryou 20 Spring Log III
*7.　*17,215 Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e 7.5
*8.　*14,337 Seirei Tsukai no Blade Dance 17
*9.　*14,063 Boku no Hero Academia Yuuei Hakusho 3
10.　*13,163 Ryuuou no Oshigoto! 7
11.　*12,552 Ryuuou no Oshigoto! 1
12.　*12,423 Oda Nobuna no Yabou Zenkokuban 20
13.　*11,192 Genjitsu Shugi Yuusha no Oukoku Saikenki 6
14.　*11,002 Ryuuou no Oshigoto! 2
15.　*10,897 Kusuriya no Hitorigoto 7
16.　*10,859 Ryuuou no Oshigoto! 3
17.　*10,651 Ryuuou no Oshigoto! 5
18.　*10,621 Ryuuou no Oshigoto! 4
19.　*10,439 Souzai Saishuka no Isekai Ryokouki 4
20.　*10,349 Ryuuou no Oshigoto! 6

Series ranking:

*1.　160,553 Sword Art Online Progressive
*2.　120,637 Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka
*3.　110,557 No Game No Life
*4.　*79,197 Ryuuou no Oshigoto
*5.　*66,641 Overlord
*6.　*42,233 Re:Zero kara Hajimeru Isekai Seikatsu
*7.　*39,439 Death March kara Hajimaru Isekai Kyousoukyoku
*8.　*38,374 Imouto Sae Ireba Ii.
*9.　*31,813 Kono Subarashii Sekai ni Shukufuku wo!
10.　*31,733 Sword Art Online
11.　*22,041 Netoge no Yome wa Onna no Ko Janai to Omotta?
12.　*19,392 Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e Tanpenshuu
13.　*19,173 Ookami to Koushinryou
14.　*18,524 Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e
15.　*17,327 Boku no Hero Academia: Yuuei Hakusho
16.　*16,137 Kokuhaku Yokou Renshuu
17.　*15,768 Kusuriya no Hitorigoto
18.　*14,770 Kagerou Daze
19.　*14,368 Eiga Doraemon: Nobita no Takarajima
20.　*14,337 Seirei Tsukai no Blade Dance

(Source:Oricon via Refugee-chan)

Last month: January 2018
Next month: March 2018

Monthly Japanese Light Novel Sales Figures January 2018

This data comes later every month…

Data covers 1st January – 4th February 2018

Volume ranking:

*1.　58,978　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e 7.5
*2.　54,507　Kagerou Daze 8
*3.　41,608　Ryuuou no Oshigoto! 7
*4.　34,188　Hidan no Aria 27
*5.　32,061　Hataraku Maou-sama! 18
*6.　26,257　Strike the Blood APPEND 1
*7.　25,968　Re:Zero kara Hajimeru Isekai Seikatsu 15
*8.　25,547　Youjo Senki 9
*9.　25,453　Gamers! 9
10.　25,446　Okitegami Kyouko no Iromihon
11.　22,867　Ryuuou no Oshigoto! 1
12.　21,724　Death March kara Hajimaru Isekai Kyousoukyoku Ex
13.　19,404　Ryuuou no Oshigoto! 2
14.　18,341　Shousetsu Idolish Seven: Ainana Gakuen
15.　18,319　Tenmei Jidou: Arslan Senki 16
16.　17,495　Ryuuou no Oshigoto! 3
17.　16,775　Kono Subarashii Sekai ni Shukufuku wo! 13
18.　16,014　Boku no Hero Academia Yuuei Hakusho
19.　15,633　Ryuuou no Oshigoto! 4
20.　14,804　Ryuuou no Oshigoto! 5

Series ranking:

*1.　151,089　Ryuuou no Oshigoto!
*2.　*89,070　Re:Zero kara Hajimeru Isekai Seikatsu
*3.　*66,443　Kagerou Daze
*4.　*64,991　Kono Subarashii Sekai ni Shukufuku wo!
*5.　*64,557　Overlord
*6.　*62,693　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e Tanpenshuu
*7.　*53,444　Death March kara Hajimaru Isekai Kyousoukyoku
*8.　*48,258　Sword Art Online
*9.　*35,525　Hidan no Aria
10.　*34,848　Gamers!
11.　*32,061　Hataraku Maou-sama!
12.　*31,946　Youjo Senki
13.　*30,834　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e
14.　*29,737　Kokuhaku Yokou Renshuu
15.　*26,585　Grancrest Senki
16.　*26,257　Strike the Blood APPEND
17.　*25,945　Boukyaku Tantei Series
18.　*25,767　Tensei Shitara Slime Datta Ken
19.　*25,275　Arifureta Shokugyou de Sekai Saikyou
20.　*22,195　Imouto Sae Ireba Ii.

(Source: Oricon via refugee-chan)

Last month: December 2017
Next month: February 2018

Monthly Japanese Light Novel Sales Figures December 2017

Data covers 4th – 31st December 2017

Volume ranking:

*1.　78,419　Tenmei Jidou Arslan Senki 16
*2.　57,433　Tensei Shitara Slime Datta Ken 11
*3.　53,531　Kono Subarashii Sekai ni Shukufuku wo! 13
*4.　45,702　Re:Zero kara Hajimeru Isekai Seikatsu 15
*5.　30,462　Death March kara Hajimaru Isekai Kyousoukyoku 12
*6.　29,763　Haikyuu!! Shousetsuban!! IX
*7.　27,364　86 -eighty-six- 3
*8.　27,353　Arifureta Shokugyou de Sekai Saikyou 7
*9.　24,173　Kagerou Daze 8
10.　24,061　Juuni Taisen Tai Juuni Taisen
11.　23,053　Date A Live Encore 7
12.　21,769　Tondemo Skill de Isekai Hourou Meshi 4
13.　20,961　Re:Zero kara Hajimeru Isekai Seikatsu Tanpenshuu 3
14.　18,140　GENESIS Series: Kyoukaisenjou no Horizon 10 part 2
15.　16,382　Hachinantte, Sore wa Nai Deshou! 12
16.　15,933　Arifureta Shokugyou de Sekai Saikyou Rei 1
17.　15,618　Isekai wa Smartphone to Tomo ni. 11
18.　15,174　Isekai Cheat Magician 7
19.　15,000　Kono Subarashii Sekai ni Shukufuku wo! Extra 2
20.　13,827　Nejimaki Seirei Senki: Tenkyou no Alderamin 13

Series ranking:

*1.　86,546　Kono Subarashii Sekai ni Shukufuku wo!
*2.　85,552　Re:Zero kara Hajimeru Isekai Seikatsu
*3.　73,844　Tensei Shitara Slime Datta Ken
*4.　40,806　86 -eighty-six-
*5.　39,696　Sword Art Online
*6.　39,443　Arifureta Shokugyou de Sekai Saikyou
*7.　37,036　Death March kara Hajimaru Isekai Kyousoukyoku
*8.　36,333　Kokuhaku Yokou Renshuu
*9.　31,393　Haikyuu!! Shousetsuban!!
10.　29,902　Juuni Taisen
11.　29,684　Kagerou Daze
12.　23,676　Tondemo Skill de Isekai Hourou Meshi
13.　23,538　Re:Zero kara Hajimeru Isekai Seikatsu Tanpenshuu
14.　23,053　Date A Live Encore
15.　22,977　Imouto Sae Ireba Ii.
16.　22,350　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e
17.　21,286　Overlord
18.　19,226　Kino no Tabi -the Beautiful World-
19.　18,881　GENESIS Series: Kyoukaisenjou no Horizon
20.　17,735　Kono Subarashii Sekai ni Shukufuku wo! Extra

(Source:Oricon via Refugee-chan)

Last month: November 2017
Next month: January 2018

Monthly Japanese Light Novel Sales Figures November 2017

Data covers 6th November – 3rd December (2017).

NOTE that this is November, not December.

Volume ranking:

*1.　66,565　Accel World 22
*2.　44,196　Kono Subarashii Sekai ni Shukufuku wo! 13
*3.　42,124　Strike The Blood 18
*4.　33,843　Highschool DxD 24
*5.　33,790　Rokudenashi Majutsu Koushi to Akashic Records 10
*6.　24,211　Madan no Ou to Vanadis 18
*7.　18,589　Arafoo Kenja no Isekai Seikatsu Nikki 5
*8.　18,027　Kokuhaku Yokou Renshuu: Ijiwaru na Deai
*9.　17,776　Kono Subarashii Sekai ni Shukufuku wo! Extra: Ano Orokamono ni mo Kyakkou wo! 2
10.　17,474　Campione! 21
11.　15,972　Tsuki ga Michibiku Isekai Douchuu 13
12.　15,751　Isekai Izakaya “Nobu” 4
13.　15,453　ONE PIECE novel Mugiwara Stories
14.　15,202　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e 7
15.　14,981　Isekai Meikyuu de Harem wo 8
16.　14,511　World Teacher: Isekaishiki Kyouiku Agent 7
17.　12,351　Daten no Inugami -SLASHDOG- 1
18.　12,248　Ore wo Suki nano wa Omae dake ka yo 7
19.　11,461　Yowa-chara Tomozaki-kun Lv.5
20.　10,302　Hyouka

Series ranking:

*1.　70,032　Kono Subarashii Sekai ni Shukufuku wo!
*2.　66,565　Accel World
*3.　42,582　Strike The Blood
*4.　39,713　Rokudenashi Majutsu Koushi to Akashic Records
*5.　36,741　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e
*6.　35,676　Imouto Sae Ireba Ii.
*7.　35,510　Sword Art Online
*8.　34,271　Kokuhaku Yokou Renshuu
*9.　33,843　Highschool DxD
10.　28,825　Re:Zero kara Hajimeru Isekai Seikatsu
11.　25,639　Kino no Tabi -the Beautiful World-
12.　24,672　Overlord
13.　24,579　Madan no Ou to Vanadis
14.　20,471　Kono Subarashii Sekai ni Shukufuku wo! Extra
15.　18,919　Arafoo Kenja no Isekai Seikatsu Nikki
16.　18,809　Isekai Izakaya “Nobu”
17.　17,474　Campione!
18.　16,775　Isekai Meikyuu de Harem wo
19.　16,492　Ore wo Suki nano wa Omae dake ka yo
20.　15,972　Tsuki ga Michibiku Isekai Douchuu

(source: Oricon via refugee-chan)

Last month: October 2017
Next month: December 2017

Oricon yearly light novel sales for 2017 (UPDATED 7th May 2018)

The period covered in this data is 21st November 2016 to 19th November 2017.

Last year’s rankings

Updated 7th May 2018 to include rank 51-200 on the book rank, rank 51-100 on the bunko rank, rank 11-50 on the book author and bunko author ranks, the bungei top 50, rank 11 to 30 on the Shinsho novels ranking and rank 21-30 on the light novels rankings

Volume ranking:

*1.　316,861　Biblia Koshodou no Jiken Techou 7
*2.　316,193　Shousetsu Kimi no Na wa. (Kadokawa Bunko)
*3.　315,396　Sword Art Online 19
*4.　226,687　Sword Art Online 20
*5.　193,530　Mahouka Koukou no Rettousei 21
*6.　192,739　Uchiage Hanabi, Shita kara Miru ka? Yoko kara Miru ka? (Kadokawa Bunko)
*7.　186,249　Yahari Ore no Seishun Love-Come wa Machigatteiru. 12
*8.　184,833　Kimi no Na wa. (Kadokawa Tsubasa Bunko)
*9.　181,093　Mahouka Koukou no Rettousei 22
10.　174,502　Mahouka Koukou no Rettousei 23
11.　170,547　Overlord 12
12.　155,404　Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka 12
13.　149,528　Kimi wa Tsukiyo ni Hikari Kagayaku
14.　144,731　Kono Subarashii Sekai ni Shukufuku wo! 11
15.　141,695　Meitantei Conan: Karakurenai no Love Letter
16.　139,076　Musubimonogatari
17.　121,067　Re:Zero kara Hajimeru Isekai Seikatsu 11
18.　115,481　Youjo Senki 1
19.　111,710　No Game No Life Practical War Game
20.　111,267　Kono Subarashii Sekai ni Shukufuku wo! 12
21.　106,742　Shinobumonogatari
22.　105,574　Re:Zero kara Hajimeru Isekai Seikatsu 12
23.　102,751　Honooro wo Ikumono
24.　*95,390　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e 5
25.　*94,430 Kamisama no Goyounin 7
26.　*91,824　Kimi no Na wa. Another Side:Earthbound
27.　*86,690　Tokyo Ghoul:re Novel [quest]
28.　*69,313　Youjo Senki 2
29.　*69,306　Tensei Shitara Slime Datta Ken 9
30.　*66,638　Tensei Shitara Slime Datta Ken 10
31.　*65,327　Haikyuu!! Shousetsuban!! 8
32.　*64,742　BLEACH WE DO knot ALWAYS LOVE YOU
33.　*64,243　Uchiage Hanabi, Shita kara Miru ka? Yoko kara Miru ka? (Kadokawa Tsubasa Bunko)
34.　*56,816　Boku no Hero Academia Yuuei Hakusho 2
35.　*50,155　Youjo Senki 3
36.　*47,562　Okitegami Kyouko no Urabyoushi
37.　*46,152　Youjo Senki 7
38.　*40,838　Gakkou no Toshi Densetsu wa Shitteiru
39.　*40,413　Suki ni Naru Sono Shunkan wo.
40.　*39,642　Zutto Mae Kara Suki Deshita
41.　*37,343　Idol Ouji wa Shitteiru
42.　*36,887　Bleach Can’t Fear Your Own World 1
43.　*36,103　Abunai Tanjoubi Blue wa Shitteiru
44.　*35,359　Gekijouban Kuroko no Basuke LAST GAME
45.　*31,811　One Piece Novel: Mugiwara Stories
46.　*30,766　Hoshi no Kirby: Meta-knight to Ginga Saikyou no Senshi
47.　*30,483　Hoshi no Kirby: Kessei! Kirby Hunters Zet no Maki
48.　*29,115　Jinrui Saikyou no Tokimeki
49.　*28,102　Boku no Hero Academia Yuuei Hakusho 1
50.　*26,790　12-sai ~Mamoritai~

Series ranking:

*1.　1,173,096　Sword Art Online
*2.　*960,418　Kono Subarashii Sekai ni Shukufuku wo!
*3.　*925,671　Re:Zero kara Hajimeru Isekai Seikatsu
*4.　*809,636　Mahouka Koukou no Rettousei
*5.　*564,642　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e
*6.　*501,026　Shousetsu Kimi no Na wa.
*7.　*489,916　Eromanga-sensei
*8.　*443,995　Rokudenashi Majutsu Koushi to Akashic Records
*9.　*426,706　Overlord
10.　*417,891　Youjo Senki
11.　*391,843　Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka
12.　*372,958　No Game No Life
13.　*330,664　Tensei Shitara Slime Datta Ken
14.　*329,389　Gamers!
15.　*288,988　Saenai Heroine no Sodatekata
16.　*277,871　Monogatari Series
17.　*269,982　Yahari Ore no Seishun Love Come wa Machigatteiru.
18.　*257,979　Kokuhaku Yokou Renshuu
19.　*240,241　Imouto Sae Ireba Ii.
20.　*236,607　Knights & Magic
21.　*220,401　Kono Subarashii Sekai ni Shukufuku wo! Spin-off
22.　*210,078　Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka Gaiden
23.　*197,894　Goblin Slayer
24.　*170,169　Arifureta Shokugyou de Sekai Saikyou
25.　*166,077　Ryuuou no Oshigoto!
26.　*163,475　Shinyaku Toaru Majutsu no Index
27.　*155,754　Isekai wa Smartphone to Tomo ni.
28.　*154,986　Hidan no Aria
29.　*148,575　Accel World
30.　*144,561　Strike the Blood

Sales by author: (note: Sales for some authors includes regular novels)

*1.　1,427,555　Kawahara Reki (Sword Art Online, Accel World, Zettai Naru Isolator)
*2.　1,191,696　Akatsuki Natsume (Kono Subarashii Sekai ni Shukufuku wo! + various spin-offs)
*3.　1,031,306　Uehashi Nahoko (no light novels released this year)
*4.　*996,174　Nagatsuki Tappei (Re:Zero kara Hajimeru Isekai Seikatsu + various spin-offs)
*5.　*835,045　Satou Tsutomu (Mahouka Koukou no Rettousei)
*6.　*662,048　Omori Fujino (Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka + various spin-offs)
*7.　*652,067　Nanatsuki Takafumi (no light novels released this year)
*8.　*622,793　Kinugasa Shougo (Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e)
*9.　*501,896　Hitsuji Tarou (Rokudenashi Majutsu Koushi to Akashic Records + spinoff)
10.　*489,916　Fushimi Tsukasa (Eromanga-sensei)
11.　*486,427　Kamiya Yuu (No Game No Life, Clockwork Planet)
12.　*449,439　Nisio Isin (Monogatari, Boukyaku Tantei Series)
13.　*429,329　Arikawa Hiro (no light novels released this year)
14.　*426,706　Maruyama Kugane (Overlord)
15.　*423,088　Shinkai Makoto (Kimi no Na wa.)
16.　*419,043　Carlo Zen (Youjo Senki)
17.　*383,447　Mikami En (Biblia Koshodou no Jiken Techou)
18.　*354,063　Aoi Sekina (Gamers!)
19.　*346,347　Fuse (Tensei Shitara Slime Datta Ken)
20.　*341,077　Maruto Fumiaki (Saenai Heroine no Sodatekata)
21.　*309,254　Yonezawa Honobu (Kotenbu series)
22.　*307,094　Watari Wataru (Yahari Ore no Seishun Love Come wa Machigatteiru)

Breakdown of individual rankings below.

Monthly Japanese Light Novel Sales Figures October 2017

Data covers 2nd October – 5th November

Volume ranking:

*1.　66,514　Overlord 12
*2.　61,293　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e 7
*3.　57,286　Kino no Tabi 21
*4.　55,736　Shinyaku Toaru Majutsu no Index 19
*5.　46,462　Saenai Heroine no Sodatekata 13
*6.　33,459　Yahari Ore no Seishun Love Comedy wa Machigatteiru. Vol.12
*7.　31,498　Sword Art Online Vol.20
*8.　30,165　Kokuhaku Yokou Renshuu: Heart no Shuchuu
*9.　24,010　Netoge no Yome wa Onna no Ko Janai to Omotta? level 15
10.　21,414　Knight’s & Magic 8
11.　21,364　Re:Zero kara Hajimeru Isekai Seikatsu 14
12.　20,678　ONE PIECE novel: Mugiwara Stories
13.　20,660　Rakudai Kishi no Cavalry 13
14.　20,657　GENESIS Series: Kyoukaisenjou no Horizon 10 pt 1
15.　18,725　Kekkai Sensen Good As Good Man
16.　17,196　Youheidan no Ryouriban 4
17.　16,273　Kokuhaku Yokou Renshuu: Ijiwaru na Deai
18.　14,686　Izakaya Bottakuri 8
19.　14,034　Watashi, Nouryoku wa Heikinchi de tte Itta yo ne! 6
20.　13,792　Shounen Onmyouji: Kegare no Migiwa e Koishitau

Series ranking:

*1. 122,079 Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e
*2. *91,043 Overlord
*3. *90,983 Kino no Tabi -the Beautiful World-
*4. *78,463 Sword Art Online
*5. *65,850 Re:Zero kara Hajimeru Isekai Seikatsu
*6. *57,920 Imouto Sae Ireba Ii.
*7. *57,481 Kokuhaku Yokou Renshuu
*8. *57,406 Shinyaku Toaru Majutsu no Index
*9. *53,989 Saenai Heroine no Sodatekata
10. *41,749 Yahari Ore no Seishun Love Come wa Machigatteiru.
11. *37,550 Kono Subarashii Sekai ni Shukufuku wo!
12. *30,804 Knight’s & Magic
13. *24,010 Netoge no Yome wa Onna no Ko Janai to Omotta?
14. *22,915 Rakudai Kishi no Cavalry
15. *20,699 No Game No Life
16. *20,678 ONE PIECE novel: Mugiwara Stories
17. *20,666 Mahouka Koukou no Rettousei
18. *20,657 GENESIS Series: Kyoukaisenjou no Horizon
19. *18,725 Kekkai Sensen Good As Good Man
20. *18,490 Isekai wa Smartphone to Tomo ni.

(source: Oricon via refugee-chan)

Last month: September 2017
Next month: November 2017

Note that due to issues with my computer this wasn’t done in the usual way, so there’s a higher than usual chance of errors. I apologise if there are any, and would welcome any errors you spot being pointed out.

Monthly Japanese Light Novel Sales Figures September 2017

Data covers 4th September – 1st October

Volume ranking:

*1.　190,225　Sword Art Online Vol.20
*2.　148,485　Yahari Ore no Seishun Love Comedy wa Machigatteiru. Vol.12
*3.　*98,550　Overlord Vol.12
*4.　*47,009　Re:Zero kara Hajimeru Isekai Seikatsu Vol.14
*5.　*34,045　Hidan no Aria Vol.26
*6.　*28,086　Goblin Slayer Vol.6
*7.　*25,129　Imouto sae Ireba Ii. Vol.8
*8.　*22,250　Tokyo Ravens Vol.15
*9.　*20,226　Knights & Magic Vol.8
10.　*19,660　Shinsetsu Ookami to Koushinryou: Ookami to Youhishi Vol.3
11.　*18,487　Gamers! DLC
12.　*16,400　Uchiage Hanabi, Shita kara Miru ka? Yoko kara Miru ka?
13.　*16,318　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e Vol.4
14.　*16,159　Heavy Object Vol.14
15.　*15,249　Mahouka Koukou no Rettousei Vol.23
16.　*15,151　Oda Nobuna no Yabou Vol.19
17.　*15,061　Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e Vol.5
18.　*14,619　Isekai wa Smartphone to Tomo ni. Vol.10
19.　*14,443　Kono Subarashii Sekai ni Shukufuku wo! Vol.12
20.　*14,419　Toaru Ossan no VRMMO Katsudouki Vol.13

Series ranking:

*1. 229,602 Sword Art Online
*2. 159,263 Yahari Ore no Seishun Love Come wa Machigatteiru.
*3. 112,173 Overlord
*4. *93,422 Re:Zero kara Hajimeru Isekai Seikatsu
*5. *84,591 Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e
*6. *45,069 Kono Subarashii Sekai ni Shukufuku wo!
*7. *40,326 Gamers!
*8. *38,996 Goblin Slayer
*9. *36,551 Knight’s & Magic
10. *35,191 Isekai wa Smartphone to Tomo ni.
11. *34,474 Hidan no Aria
12. *33,460 Imouto Sae Ireba Ii.
13. *33,379 No Game No Life
14. *30,438 Mahouka Koukou no Rettousei
15. *22,250 Tokyo Ravens
16. *20,922 Ookami to Koushinryou
17. *19,122 Tensei Shitara Slime Datta Ken
18. *18,843 Uchiage Hanabi, Shita kara Miru ka? Yoko kara Miru ka?
19. *18,487 Gamers! DLC
20. *16,159 Heavy Object

Last month: August 2017
Next month: October 2017

(source: Oricon via myanimelist (volume rankings) and a source who wishes to remain anonymous (for the series rankings))