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
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
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
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~
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
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
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
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
No English License for the light novels