Forum Settings
Forums

Japan's Weekly Light Novel Rankings for Feb 15 - 21

#1
Feb 24, 2016 2:28 PM
News Team
Your_Bartender🍸

Offline
Joined: Apr 2010
Posts: 2220
Here are the weekly light novel rankings for February 15 - 21

Rank / This week's sales by copies / Cumulative sales / Titles

*1. 12,367 *50,705 Hataraku Maou-sama! Vol.15
*2. 10,870 *96,959 Kono Subarashii Sekai ni Shukufuku wo! Vol.1
*3. *9,432 *11,777 Seiken Tsukai no World Break Vol.15
*4. *9,201 *81,915 Kono Subarashii Sekai ni Shukufuku wo! Vol.2
*5. *7,948 *72,768 Kono Subarashii Sekai ni Shukufuku wo! Vol.3
*6. *7,930 **7,930 Full Metal Panic! Another Vol.12
*7. *7,633 *11,185 Goblin Slayer
*8. *7,096 *64,782 Kono Subarashii Sekai ni Shukufuku wo! Vol.4
*9. *7,012 *21,898 Durarara!! SH Vol.4
10. *7,000 **7,000 Full Metal Panic! Another SS

11. *6,680 *28,188 Zettai naru Isolator Vol.3
12. *6,478 **8,496 Choujin Koukousei-tachi wa Isekai demo Yoyuu de Ikinuku you desu! Vol.2
13. *6,256 **7,780 Jinrou e no Tensei, Maou no Fukukan Vol.2
14. *5,986 *45,390 Kono Subarashii Sekai ni Shukufuku wo! Vol.8
15. *5,747 *60,289 Kono Subarashii Sekai ni Shukufuku wo Vol.5
16. *5,616 *55,303 Kono Subarashii Sekai ni Shukufuku wo! Vol.6
17. *5,486 *49,882 Kono Subarashii Sekai ni Shukufuku wo! Vol.7
18. *5,474 *14,483 Tada, Soredake Yokatta ndesu
19. *4,873 *20,939 Heavy Object Vol.11
20. *4,537 **5,158 Liede Fusai no Naresome: Mayoikonda Kimi no Himitsu

21. *4,420 **4,420 Isekai wa Smartphone to Tomo ni. Vol.4
22. *4,386 132,637 Monogatari Series: Off Season Vol.2 "Wazamonogatari"
23. *3,737 **4,492 Yasei Last Boss ga Arawareta! Vol.1
24. *2,945 **3,609 Mahou no Kuni no Madan Vol.2
25. *2,721 *16,350 Bungou Stray Dogs Gaiden Vol.1
26. *2,467 **2,467 Ginga Rengou Nippon Vol.1
27. *1,957 **1,957 Uchi no Musume no Tame naraba, Ore wa Moshikashitara Maou mo Taoseru Kamoshirenai. Vol.3

Separated by Specific Ranking
Bunko
*8. 12,367 *50,705 Hataraku Maou-sama! Vol.15
12. 10,870 *96,959 Kono Subarashii Sekai ni Shukufuku wo! Vol.1
14. *9,432 *11,777 Seiken Tsukai no World Break Vol.15
15. *9,201 *81,915 Kono Subarashii Sekai ni Shukufuku wo! Vol.2
20. *7,948 *72,768 Kono Subarashii Sekai ni Shukufuku wo! Vol.3
21. *7,930 **7,930 Full Metal Panic! Another Vol.12
23. *7,633 *11,185 Goblin Slayer
25. *7,096 *64,782 Kono Subarashii Sekai ni Shukufuku wo! Vol.4
26. *7,012 *21,898 Durarara!! SH Vol.4
27. *7,000 **7,000 Full Metal Panic! Another SS

28. *6,680 *28,188 Zettai naru Isolator Vol.3
30. *6,478 **8,496 Choujin Koukousei-tachi wa Isekai demo Yoyuu de Ikinuku you desu! Vol.2
34. *5,986 *45,390 Kono Subarashii Sekai ni Shukufuku wo! Vol.8
38. *5,747 *60,289 Kono Subarashii Sekai ni Shukufuku wo! Vol.5
39. *5,616 *55,303 Kono Subarashii Sekai ni Shukufuku wo! Vol.6
40. *5,486 *49,882 Kono Subarashii Sekai ni Shukufuku wo! Vol.7
41. *5,474 *14,483 Tada, Soredake de Yokatta ndesu
48. *4,873 *20,939 Heavy Object Vol.11
(cut-off 4,724)


Book
46. *6,256 **7,780 Jinrou e no Tensei, Maou no Fukukan Vol.2
(cut-off 6,106)


Literature Books Genre (duplicates removed)
*7. *4,420 **4,420 Isekai wa Smartphone to Tomo ni. Vol.4
*8. *4,386 132,637 Monogatari Series: Off Season Vol.2 "Wazamonogatari"
10. *3,737 **4,492 Yasei Last Boss ga Arawareta! Vol.1
11. *2,945 **3,609 Mahou no Kuni no Madan Vol.2
13. *2,721 *16,350 Bungou Stray Dogs Gaiden Vol.1
15. *2,467 **2,467 Ginga Rengou Nippon Vol.1
20. *1,957 **1,957 Uchi no Musume no Tame naraba, Ore wa Moshikashitara Maou mo Taoseru Kamoshirenai. Vol.3
(cut-off 1,957)

Source: Oricon Youtaijou

← Previous Week
Modified by Snow, Feb 25, 2016 11:11 AM
 
#2
Feb 24, 2016 2:31 PM
News Team
Offline
Joined: Nov 2011
Posts: 100036
Another week of Hataraku Maou-sama! ranking at #1, awesome. Goblin Slayer doing better than I had expected.

Full Metal Panic! Another almost broke 8k...
 
#3
Feb 24, 2016 2:35 PM

Offline
Joined: Mar 2014
Posts: 17571
Snow said:
*7. *7,633 *11,185 Goblin Slayer
Grimgal really isn't that popular for you to be ripping it off so soon...

"Uchi no Musume no Tame naraba, Ore wa Moshikashitara Maou mo Taoseru Kamoshirenai." has a MAL page, title isn't the exact same though.
http://myanimelist.net/manga/86870/Uchi_no_Musume_no_Tame_naraba_Ore_wa_Moshikashitara_Maou_mo_Taoseru_kamo_Shirenai
Glad this is selling too, the first chapter I read was probably the cutest thing in any LN I ever read.
 
#4
Feb 24, 2016 2:36 PM
Offline
Joined: Jun 2015
Posts: 76
Wow, nice to see Devil is a Part-Timer topping the charts

A small part of me hopes it sparks an interest in making another anime of it
 
#5
Feb 24, 2016 2:43 PM

Offline
Joined: Dec 2013
Posts: 10872
Where is my season 2 of devil is a part timer???
 
#6
Feb 24, 2016 2:52 PM
┬┴┬┴┤ ͜ʖ ͡°) ├┬┴

Offline
Joined: Nov 2014
Posts: 5524
dat KonoSuba boost.
EVERYDAY, WE STRAY FURTHER FROM KAMISAMA'S LIGHT
 
#7
Feb 24, 2016 2:54 PM

Offline
Joined: Sep 2012
Posts: 3943
58K more for KonoSuba LOL.
 
#8
Feb 24, 2016 3:03 PM

Offline
Joined: May 2014
Posts: 261
Aaaannndddd KonoSuba continues to destroy this list. The anime is so good, hopefully the start producing these light novels in English at a more frequent pace. C'mon Japan, you're dual-printing Platinum End in English and Japanese, all I'm asking for is to do the same with KonoSuba.
 
#9
Feb 24, 2016 3:04 PM

Offline
Joined: Mar 2012
Posts: 16025
Paulo27 said:
Snow said:
*7. *7,633 *11,185 Goblin Slayer
Grimgal really isn't that popular for you to be ripping it off so soon...

"Uchi no Musume no Tame naraba, Ore wa Moshikashitara Maou mo Taoseru Kamoshirenai." has a MAL page, title isn't the exact same though.
http://myanimelist.net/manga/86870/Uchi_no_Musume_no_Tame_naraba_Ore_wa_Moshikashitara_Maou_mo_Taoseru_kamo_Shirenai
Glad this is selling too, the first chapter I read was probably the cutest thing in any LN I ever read.
This one is about adventurer that raise a child isn't it?

Well what I'm waiting is result for today sales next week since Blade Dance and Magika is out today.
 
Feb 24, 2016 3:11 PM

Offline
Joined: Mar 2014
Posts: 17571
NeoAnkara said:
This one is about adventurer that raise a child isn't it?
Yep, he finds a kid in the forest and takes her home.
 
Feb 24, 2016 3:19 PM

Offline
Joined: Aug 2012
Posts: 1192
Man I'm hoping so bad for a translation of FMP Another

Which reminds me I still have to read the original novels
 
Feb 24, 2016 4:52 PM

Offline
Joined: Jan 2014
Posts: 5813
KonoSuba really deserves it...Pure fun...Nothing less,nothing more...We need more anime like that...Other than sometimes derpy art it's a perfect for its genre...
 
Feb 24, 2016 5:00 PM

Offline
Joined: Aug 2015
Posts: 2066
when will i get Hataraku Maou-sama! S2 japan...when?? :(
Anyway go kono suba....very happy for this
 
Feb 24, 2016 5:15 PM
Offline
Joined: Dec 2011
Posts: 449
Paulo27 said:
Snow said:
*7. *7,633 *11,185 Goblin Slayer
Grimgal really isn't that popular for you to be ripping it off so soon...


オリコン  2016年2月15日~2016年2月21日 ライトノベル商品グループ別(2016年2月29日付)
*1位 57,950部 この素晴らしい世界に祝福を!
*2位 23,385部 灰と幻想のグリムガル
*3位 12,823部 はたらく魔王さま!
*4位 12,785部 最弱無敗の神装機竜≪バハムート≫
*5位 10,717部 聖剣使いの禁呪詠唱<ワールドブレイク>
*6位 10,014部 <物語>シリーズ
*7位 *9,532部 ノーゲーム・ノーライフ(KADOKAWA)
*8位 *8,321部 この素晴らしい世界に祝福を! スピンオフ
*9位 *7,930部 フルメタル・パニック! アナザー
10位 *7,886部 オーバーロード

It's more like high cut off so you didn't see Grimgar there actually, but it's safely in second place of series ranking.
 
Feb 24, 2016 5:22 PM

Offline
Joined: Mar 2014
Posts: 17571
D-Joe said:
Paulo27 said:
Grimgal really isn't that popular for you to be ripping it off so soon...


オリコン  2016年2月15日~2016年2月21日 ライトノベル商品グループ別(2016年2月29日付)
*1位 57,950部 この素晴らしい世界に祝福を!
*2位 23,385部 灰と幻想のグリムガル
*3位 12,823部 はたらく魔王さま!
*4位 12,785部 最弱無敗の神装機竜≪バハムート≫
*5位 10,717部 聖剣使いの禁呪詠唱<ワールドブレイク>
*6位 10,014部 <物語>シリーズ
*7位 *9,532部 ノーゲーム・ノーライフ(KADOKAWA)
*8位 *8,321部 この素晴らしい世界に祝福を! スピンオフ
*9位 *7,930部 フルメタル・パニック! アナザー
10位 *7,886部 オーバーロード

It's more like high cut off so you didn't see Grimgar there actually, but it's safely in second place of series ranking.
Ok, that's just impossible, Grimgal only has 7 volumes out. 2*7=14k If it's selling above 14k at least one of the volumes would have to rank in some way.
 
Feb 24, 2016 5:26 PM
Offline
Joined: Dec 2011
Posts: 449
Paulo27 said:
D-Joe said:


オリコン  2016年2月15日~2016年2月21日 ライトノベル商品グループ別(2016年2月29日付)
*1位 57,950部 この素晴らしい世界に祝福を!
*2位 23,385部 灰と幻想のグリムガル
*3位 12,823部 はたらく魔王さま!
*4位 12,785部 最弱無敗の神装機竜≪バハムート≫
*5位 10,717部 聖剣使いの禁呪詠唱<ワールドブレイク>
*6位 10,014部 <物語>シリーズ
*7位 *9,532部 ノーゲーム・ノーライフ(KADOKAWA)
*8位 *8,321部 この素晴らしい世界に祝福を! スピンオフ
*9位 *7,930部 フルメタル・パニック! アナザー
10位 *7,886部 オーバーロード

It's more like high cut off so you didn't see Grimgar there actually, but it's safely in second place of series ranking.
Ok, that's just impossible, Grimgal only has 7 volumes out. 2*7=14k If it's selling above 14k at least one of the volumes would have to rank in some way.

The cut off is in 4724 one(bunko ranking), not the ranking that with 1957 sales, according to Kuudere.
Something like 3350x7=23450, so it's possible actually.

Maybe this ranking thread should also start posting series ranking?
 
Feb 24, 2016 5:31 PM

Offline
Joined: Apr 2014
Posts: 850
Man, the Japs sure love KonoSuba. Guess harems will never die out, eh?
 
Feb 24, 2016 5:35 PM
Offline
Joined: Dec 2011
Posts: 449
Hongu said:
Man, the Japs sure love KonoSuba. Guess harems will never die out, eh?

I'm pretty sure harem isn't the reason Konosuba popular.
 
Feb 24, 2016 5:35 PM

Offline
Joined: Mar 2014
Posts: 17571
D-Joe said:
Paulo27 said:
Ok, that's just impossible, Grimgal only has 7 volumes out. 2*7=14k If it's selling above 14k at least one of the volumes would have to rank in some way.

The cut off is in 4724 one(bunko ranking), not the ranking that with 1957 sales, according to Kuudere.
Something like 3350x7=23450, so it's possible actually.

Maybe this ranking thread should also start posting series ranking?
I see I see, oversight on my end.
 
Feb 24, 2016 6:14 PM

Offline
Joined: Jul 2014
Posts: 2446
 
Feb 24, 2016 7:14 PM

Offline
Joined: Sep 2011
Posts: 151
Konosuba selling like hotcakes.
 
Feb 24, 2016 7:32 PM

Offline
Joined: Sep 2013
Posts: 21069
Konosuba killing it, big LN boosts are the future.

Series Ranking
10位 *7,886部 Overlord

Vol 10 delayed up the skeleton rectum.

Feels bad man.

 
Feb 24, 2016 8:12 PM

Offline
Joined: Jul 2014
Posts: 826
So Kono Subarashii Sekai ni Shukufuku wo! the top series: is a Harem? *Sigh*
I play video games. You should play a video game because you read my signature.
 
Feb 24, 2016 8:26 PM

Offline
Joined: Aug 2012
Posts: 431
I am still waiting for Hataraku Season 2.
 
Feb 24, 2016 8:30 PM
SHSL Good Luck

Offline
Joined: Apr 2015
Posts: 5985
Hongu said:
Man, the Japs sure love KonoSuba. Guess harems will never die out, eh?
TheHatredDMC said:
So Kono Subarashii Sekai ni Shukufuku wo! the top series: is a Harem? *Sigh*
KonoSuba's much more than a harem. It's primarily popular because of its comedy.
 
Feb 24, 2016 8:43 PM

Offline
Joined: Apr 2013
Posts: 7247
Gensan said:
well well, half of the chart is KonoSuba.. good good.


KonoSuba 2 gud man.

Keep rising in sales AOTS source material!
 
Feb 24, 2016 8:57 PM

Offline
Joined: Aug 2015
Posts: 1899
So much KonoSuba! Love it!
 
Feb 24, 2016 9:13 PM
Offline
Joined: Aug 2012
Posts: 403
Kono Subarashii is everywhere on the rankings

*3. *9,432 *11,777 Seiken Tsukai no World Break Vol.15

Would love a 2nd season of this.
 
Feb 24, 2016 9:25 PM

Offline
Joined: Feb 2014
Posts: 1194
Surely KonoSuba gets a second season with endless huge sale increases
 
Feb 24, 2016 10:28 PM

Offline
Joined: Nov 2013
Posts: 136
eXtacy67 said:
Surely KonoSuba gets a second season with endless huge sale increases


Just like Hataraku or NGNL, right?
 
Feb 24, 2016 11:05 PM

Offline
Joined: Jan 2015
Posts: 2721
Konosuba absolutely destroying it.

Now if only a certain anime can finally gets it's much deserved second season.
Big Order (TV):great anime or greatest anime?
 
Feb 25, 2016 12:39 AM

Offline
Joined: Oct 2015
Posts: 618
Just like many other still waiting for that 2nd season of Hataraku Maou-sama! ^^ and konosuba rulling the whole list another week, the anime gave really a huge boost as it seems, just sad that we only gonna get 11episodes for this 1st season :( anyway hoping for a future 2nd season perhaps will see how the BD-DVD gonna be.
 
Feb 25, 2016 12:43 AM

Offline
Joined: Dec 2011
Posts: 8361
POS ranks for series with ongoing anime adaptations:

KonoSuba:
*31位 この素晴らしい世界に祝福を! あぁ、駄女神さま
*43位 この素晴らしい世界に祝福を!2 中二病でも魔女がしたい!
*49位 この素晴らしい世界に祝福を!3 よんでますよ、ダクネスさん。
*64位 この素晴らしい世界に祝福を!4 鈍ら四重奏 ~ナマクラカルテット~
218位 この素晴らしい世界に祝福を!スピンオフ この素晴らしい世界に爆焔を! めぐみんのターン
*85位 この素晴らしい世界に祝福を!5 爆裂紅魔にレッツ&ゴー!!
266位 この素晴らしい世界に祝福を!スピンオフ この素晴らしい世界に爆焔を!2 ゆんゆんのターン
100位 この素晴らしい世界に祝福を!6 六花の王女
305位 この素晴らしい世界に祝福を!スピンオフ この素晴らしい世界に爆焔を!3 ふたりは最強!のターン
117位 この素晴らしい世界に祝福を!7 億千万の花嫁
104位 この素晴らしい世界に祝福を!8 アクシズ教団VSエリス教団

Grimgar:
173位 灰と幻想のグリムガル level.1 ささやき、詠唱、祈り、目覚めよ
172位 灰と幻想のグリムガル level.2 大切じゃないものなんか、ない。
183位 灰と幻想のグリムガル level.3 思い通りに行かないのが世の中だと割り切るしかなくても
209位 灰と幻想のグリムガル level.4 導き導かれし者たち
234位 灰と幻想のグリムガル level.5 笑わないで聞いておくれよ
303位 灰と幻想のグリムガル level.6 とるにたらない栄光に向かって
374位 灰と幻想のグリムガル level.7 彼方の虹

Saijaku Muhai no Bahamut:
464位 最弱無敗の神装機竜
392位 最弱無敗の神装機竜3
439位 最弱無敗の神装機竜4
446位 最弱無敗の神装機竜5

Durarara!!:
*94位 デュラララ!!SH×4 (new last week)

Heavy Object:
139位 ヘヴィーオブジェクト バニラ味の化学式 (new last week)

(source: POS via book-rank.net)

Oricon Series ranking:

*1位 57,950部 Kono Subarashii Sekai ni Shukufuku wo!
*2位 23,385部 Hai to Gensou no Grimgar
*3位 12,823部 Hataraku Maou-sama!
*4位 12,785部 Saijaku Muhai no Bahamut
*5位 10,717部 Seiken Tsukai no World Break
*6位 10,014部 Monogatari Series
*7位 *9,532部 No Game No Life
*8位 *8,321部 Kono Subarashii Sekai ni Shukufuku wo! Spin off
*9位 *7,930部 Full Metal Panic! Another
10位 *7,886部 Overlord
11位 Sword Art Online
12位 Goblin Slayer
13位 Choujin Koukousei-tachi wa Isekai demo Yoyuu de Ikinuku you desu!
14位 Zettai Naru Isolator
15位 Durarara!! SH
16位 Full Metal Panic! Another SS
17位 Jinrou e no Tensei, Maou no Fukukan
18位 Heavy Object
19位 Sakka Alice Series
20位 Tada, Soredake de Yokattandesu

(source: Oricon via refugee-chan and the Oricon website)
Modified by kuuderes_shadow, Feb 25, 2016 12:49 AM
Weekly light novel release list (data back to 20th October 2014)
Monthly light novel sales rankings (Jan 2015 onwards)
Best selling Light Novel volumes of the year/all time*.
*that there is data for

There is no such thing as shit taste. Only idiots who think everyone should have the same taste as they do.
 
Feb 25, 2016 12:58 AM

Offline
Joined: Dec 2011
Posts: 8361
D-Joe said:

The cut off is in 4724 one(bunko ranking), not the ranking that with 1957 sales, according to Kuudere.

Not quite. There's also a Top 20 Light Novels ranking, with a threshold this week of 4537

Maybe this ranking thread should also start posting series ranking?

The series rankings usually come out a couple of hours after the volume rankings (at least on the website, not sure about youtaiju) which could be why.
Weekly light novel release list (data back to 20th October 2014)
Monthly light novel sales rankings (Jan 2015 onwards)
Best selling Light Novel volumes of the year/all time*.
*that there is data for

There is no such thing as shit taste. Only idiots who think everyone should have the same taste as they do.
 
Feb 25, 2016 1:12 AM

Offline
Joined: Jun 2015
Posts: 987
Snow said:
*1. 12,367 *50,705 Hataraku Maou-sama! Vol.15

Season 2 when?
I would kill to get more of this series in anime format.
 
Feb 25, 2016 1:27 AM

Offline
Joined: Aug 2014
Posts: 453
1. 12,367 *50,705 Hataraku Maou-sama! Vol.15


I need the season 2... Please... I don't have the patience anymore...
sup
 
Feb 25, 2016 2:03 AM

Offline
Joined: Feb 2014
Posts: 128
YAAAY!! KonoSuba's boost is Wonderful, Keep it up dear!!
 
Feb 25, 2016 3:00 AM

Offline
Joined: Sep 2012
Posts: 3943
GoldenDevilGamer said:
Hongu said:
Man, the Japs sure love KonoSuba. Guess harems will never die out, eh?
TheHatredDMC said:
So Kono Subarashii Sekai ni Shukufuku wo! the top series: is a Harem? *Sigh*
KonoSuba's much more than a harem. It's primarily popular because of its comedy.

Specifically, KonoSuba is a comedic PARODY of "trapped in a game" harem light novels and anime. So people who complain about harems should ENJOY it, as it is making fun of the genre and it does a great job at that while at the same time creating some very enjoyable characters in their own right.
MKusanagi said:
eXtacy67 said:
Surely KonoSuba gets a second season with endless huge sale increases


Just like Hataraku or NGNL, right?

And Mondaiji-tachi... a good light novel boost does not mean a second season of anime because a second season of anime rarely produces any more light novel boost than the first season. Unless it looks like the second season of anime will pay for itself we likely won't get to see it. Right now KonoSuba is doing well on discs but perhaps not well enough.

The 10 TV episodes + 1 OVA on the next novel in particular is the KISS OF DEATH lately. This publisher commonly does this 10+1 and done adaptation formula.
 
Feb 25, 2016 4:03 AM
Offline
Joined: Dec 2011
Posts: 394
KonoSuba boost is subarashii! LOL
 
Feb 25, 2016 6:36 AM
Offline
Joined: Sep 2014
Posts: 15
Glad that Hataraku is doing well.. Season 2 Please! :D
 
Feb 25, 2016 7:25 AM

Offline
Joined: Aug 2015
Posts: 1985
Laughing at some people thinking that Konosuba is just run-of-the-mill harem series when there's more than that, anyway this series is a huge success in terms of LN sales and even the BD sales estimates and I'm happy with what I'm seeing so far, smells like a sequel is about to come very soon.
 
Feb 25, 2016 2:25 PM

Offline
Joined: Aug 2008
Posts: 197
Go Maou-sama, go ^^ We need that 2nd season :P

My Anime Lists: AniDB & MAL
 
Feb 25, 2016 2:38 PM

Offline
Joined: Feb 2015
Posts: 30
wow, konosuba anime really hyped the LN, didn't thought that it would climb so many positions.
 
Feb 25, 2016 4:29 PM

Offline
Joined: Jan 2015
Posts: 296
People say Index fell off, but didn't durarara used to sell in the 200k range, look at it now, how did that happen...
 
Feb 26, 2016 1:19 AM

Offline
Joined: Dec 2011
Posts: 8361
chrisbj said:
People say Index fell off, but didn't durarara used to sell in the 200k range, look at it now, how did that happen...


That was all during the crazy anime boost it got (and it was in the 300ks). Bear in mind that only SAO has ever matched Durarara!!'s anime boost - Index's boost wasn't even visible (thresholds were much higher then due to there being fewer rankings but that affects Durarara!! as well). Only a couple of series ever have had regular rankings of backlog sales during the anime boost and then continued to achieve those sales afterwards, and those were generally ones that either got more anime that succeeded in boosting sales again, or that didn't make anything bigger than weekly rankings from the sales boost.

Comparing sales now to gains from an unprecedented sales boost in one series to sales now against sales well after the anime aired for another is not a good measure.

If you look at Durarara!!'s sales after roughly 3.5 weeks for post-anime volumes you get:
(vol 8 - 130804 in 25 days, released as the anime was ending)
vol 9 - 141242 in 25 days
vol 10 - 136835 in 26 days
vol 11 - 108176 in 25 days
--gap of more than a year*
vol 12 - 78768 in 23 days
vol 13 - 75396 in 24 days
-switch to a new series-**
SH 1 - 45275 in 25 days
SH 2 - 35024 in 24 days
SH 3 - 37072 in 23 days

SH 4 is currently 21898 in 11 days.

The only really big drop in that time that aren't explainable by other factors was between vols 10 and 11. SH 1 to SH 2 is also notable. On the other hand, Index has had a couple of very big drops with no obvious reason behind them at all.

But yes, both series are a lot lower than they were in the past.

* a long gap always reduces sales - for comparison Index has never had a gap of more than 9 months, and none longer than 5 months while its sales have been dropping
** Index technically did as well, but from what I gather that's more of a direct continuation than Durarara's and also the biggest sales came AFTER the switch to the new series - Index 22 to Shinyaku 1 actually saw sales go up.
Weekly light novel release list (data back to 20th October 2014)
Monthly light novel sales rankings (Jan 2015 onwards)
Best selling Light Novel volumes of the year/all time*.
*that there is data for

There is no such thing as shit taste. Only idiots who think everyone should have the same taste as they do.