List is compiled from the Oricon website.
10) 7,959 Copies Sold – Shōsetsu eiga doraemon Nobita no getsumen tansa-ki
aka 小説 映画ドラえもん のび太の月面探査記
aka Doraemon the Movie 2019: Nobita’s Chronicle of the Moon Exploration
9) 8,276 Copies Sold – Date a Bullet Volume 5
デート·ア·バレット 5 デート·ア·ライブ フラグメント
Spin Off of Date a Live
No License for the this series or its parent series
8) 8,281 Copies Sold – To Aru Ossan no VRMMO Katsudouki Vol. 18
とあるおっさんのVRMMO活動記 18
A Certain Middle-Aged Man’s VRMMO Activity Log
https://www.novelupdates.com/series/a-certain-middle-aged-mans-vrmmo-activity-log/
No License for the Light Novels
7) 8,936 Copies Sold – Goblin Slayer Vol. 10
ゴブリンスレイヤー 10
https://www.novelupdates.com/series/goblin-slayer/
Light Novel series is licensed for English release by Yen On
6) 9,239 Copies Sold – Isekai wa Smartphone to Tomoni Volume 16
異世界はスマートフォンとともに。 16
aka In Another World With My Smartphone
https://www.novelupdates.com/series/in-a-different-world-with-a-smartphone/
Licensed for English release by J-Novel Club
5) 12,335 Copies Sold – Isekai Yururi Kikou ~Kosodate shinagara Boukensha shimasu~ Volume 6
異世界ゆるり紀行 子育てしながら冒険者します 6
Isekai Yururi Kikou ~Raising Children While Being an Adventurer~
https://www.novelupdates.com/series/isekai-yururi-kikou-raising-children-while-being-an-adventurer/
No English License for the light novels
4) 12,892 Copies Sold – Kamitachi ni Hirowareta Otoko Volume 6
神達に拾われた男 6
The Man Picked up by the Gods
https://www.novelupdates.com/series/the-man-picked-up-by-the-gods/
No English License for the light novels
3) 13,809 Copies Sold – High School DxD DX Volume 6
ハイスクールD×D DX.5 スーパーヒーロートライアル
https://www.novelupdates.com/series/high-school-dxd-dx/
No English license for the light novels or their parent series. The manga of High School DxD is licensed by Yen Press
2) 15,694 Copies Sold – Rokudenashi Majutsu Koushi to Akashic Records Volume 14
ロクでなし魔術講師と禁忌教典 14
Akashic Records of the Bastard Magical Instructor
https://www.novelupdates.com/series/akashic-records-of-the-bastard-magical-instructor/
No license for the light novels. The manga is licensed by Seven Seas
1) 25,855 Copies Sold – Date A Live Volume 20
デート·ア·ライブ 20 十香ワールド
https://www.novelupdates.com/series/date-a-live/
No English License for the light novels