List of Manga (and some Manhwa/Manhua) chapters with toilet scenes (as of October 6, 2022)

360 Aphrodisiac Trap Chapter 2
Absolute Duo Chapter 17
After Hours Chapter 7
Anata ga Shite Kurenakute Mo Chapter 20
Angel - The Women Whom Delivery Host Kosume Atami Healed Chapter 2
Ano Oni Kyoushi ga Boku no Ane ni Narundesuka Chapter 13
Ano Oni Kyoushi ga Boku no Ane ni Narundesuka Chapter 2
Arasa Quest Chapter 7
Asa Okitara Onna no Ko ni Natteta Chapter 2
Asa Okitara Onnanoko ni Natteta Chapter 2
Atashi no Senpai Chapter 4
B Gata H Kei Chapter 255
Battle Club Volume 6 Chapter 4
Beelzebub-jou no Oki ni Mesu Mama Chapter 35
Blood The Last Vampire Chapter 5
Blue Drop ~Tenshi no Bokura~ Chapter 6
Blush-DC Chapter 59
Blush-DC Chapter 9
Bokura no Fushidara Chapter 1
Bousou Shoujo Chapter 38
Bousou Shoujo Chapter 44
Bousou Shoujo Chapter 7 (this manga has multiple scenes actually but I didn't boookmark all of them)
Boyish Mao is Hiding Her Erotic Body Chapter 2 (actually a Webtoon, but I included it in the manga list since it's Japanese)
Chiro Star Project Chapter 6 (this is a manhwa but is included since here since it's a black and white comic)
Chisa x Pon Chapter 18
Corpse Party Book of Shadows Chapter 10
Criminale Chapter 4
Damekko Mii-chan (だめっ子みーちゃん, One-shot)
Dead Tube Chapter 80
Devilchi Chapter 72 (this series also has another toilet scene later on, but not in the translated chapters)
Do-M Joshi to Gakkari Joou-sama Chapter 29
Dolls Fall Chapter 10
Dolls Fall Chapter 12
Double Play Chapter 16
Dousei Recipe Chapter 4
Doutei Hanashi Chapter 14
Dual na Kanojo no Taoshikata Chapter 5
Floor ni Maou ga Imasu Chapter 46
Fractale Chapter 5
Frogman Chapter 23
Fushidara Sensei wa Itsumo Nureginu Chapter 12
Fuufu Ijou, Koibito Miman Chapter 17
Gaishuu Isshoku Chapter 41
Gal Knight Angelica Chapter 10
Gal-sen Chapter 13
Gigant Chapter 62
Gigant Chapter 85 (there are others but this is the one I bookmarked)
Girigiri Out Chapter 35 (this manga has multiple scenes, but this is my personal favorite)
Gisou Honey Trap Chapter 4
Hana Yori Dango Chapter 40
Hanjuku Joshi Chapter 10
Hapiel Chapter 21
Hare-kon Chapter 66
Henai Girl Chapter 1
Hime Koukan Chapter 18
Hime No Dameshi Chapter 26
Hirasaka Hinako ga Ero Kawaii koto wo Ore dake ga Shitte iru Chapter 2
Hirasaka Hinako ga Ero Kawaii koto wo Ore dake ga Shitte iru Chapter 26
Hirasaka Hinako ga Ero Kawaii koto wo Ore dake ga Shitte iru Chapter 37
Hoshikawa Ginza Yonchoume Chapter 19.5
Hyoujou ga Issai Wakaranai Shirogane-san Chapter 11
Ibitsu (Okada Kazuto) Chapter 49
Ice Cream Kanojo Chapter 20
Ichigo no Gakkou Chapter 1
Iinazuke Kyoutei Chapter 27
Iinazuke Kyoutei Chapter 4.5
Ijousha no Ai Chapter 17
Iketeru Futari Chapter 48
Imouto Sae Ireba ii Chapter 16
Iroha ni ho Ero! Chapter 18
Iron Virgin Jun page 15 onwards
Joshikou no Kohi-sensei Chapter 4
Joshikousei no Mudazukai Chapter 44.1
Joshikousei no Mudazukai Chapter 6
Joyuu ni Gachi Koi no Mushoku Chapter 37
Kaigeki no Panzer Chapter 8
Kaikan Douki Chapter 54
Kanojo no Yasei ga Te ni Oenai Chapter 18
Kenja no Deshi wo Nanoru Kenja Chapter 58 (note that this manga has multiple scenes)
Kodomo no Jikan Chapter 42
Koisuru Succubus no Ikenai Jijou Chapter 8
Komi-san wa, Comyushou desu. Chapter 45
Kunoichi Joshikousei Otonashi-san Chapter 4
Lemon Angel Volume 6 (can't remember what chapter, it's on Mangasee)
Love Buzz Chapter 21
Love Buzz Chapter 21
Love Hina Chapter 1
Love Hina Chapter 100
Love Hina Chapter 75
M.A.X. Chapter 2 (this is a manhwa but is included since here since it's a black and white comic)
Maga Tsuki Chapter 65.5 (can be read in Mangasee) (the manga also has two other toilet scenes but I can't remember what chapters exactly)
Magetsukan Kital Chapter 32
Maguro Shoujo Chapter 1
Maguro Shoujo Chapter 9
Maken-Ki  Chapter 35
Makikomarete Isekai Teni suru Yatsu wa, Taitei Cheat Chapter 34
Mama wa Doukyuusei Chapter 17
Minamoto-kun Monogatari Chatper 243
Momo no Susume Chapter 3
Muv-Luv Alternative Chapter 15
My First Time Is With My Little Sister Chapter 31 (actually a Webtoon, but I included it in the manga list since it's Japanese)
My First Time Is With My Little Sister Chapter 41
Nana to Kaori Chapter 42
Necro;Chronicle Chapter 2
Nejimage Factor Chapter 1
Nekota no Koto ga Ki ni Natte Shikatanai Chapter 32
O/A Chapter 12
Obokoi Majo wa Majiwaritai!? Chapter 13
Oku-sama wa Niizuma-chan Chapter 25
Omujo Chapter 4
Onimaru (Oneshot)
Ookami Shounen Wa Kyou Mo Uso O Kasaneru Chapter 4
Ore ga Watashi ni Naru made Chapter 1
Ore ga Watashi ni Naru made Chapter 6
Ore no Tsugai ni Nare Chapter 62
Oshikake Gyaru no Nakamura-san Chapter 13
Otome No Iroha Chapter 1
Owari no Seraph Chapter 110
Ponkotsu Tsundere no Osananajimi Chapter 27
Reader Chapter 2
Redman Princess: Akaryou Oujo Chapter 2
Remake Toko Chapter 3
Rororro! Chapter 88
Sabae To Yattara Owaru Chapter 4
Saikin, Imouto no Yousu ga Chotto Okashii n da ga. Chapter 18
Saikin, Imouto no Yousu ga Chotto Okashii n da ga. Chapter 3
Sakuranbo Syndrome Chapter 14
Sanda Chapter 50-51
Sayonara Eden Chapter 24
Sayonara Eden Chapter 8-10 (it was one of these chapters, can't remember which one)
SE (System Engineer) Chapter 23
Sei Kaihou Sorezore no Ai no Katachi Chapter 7
Seikon no Qwaser Chapter 48
Seishokuki Chapter 16
Seishokuki Chapter 37
Seitokai Sousenkyo Chapter 14
Sheeply Horned Witch Romi (Chapter 11)
Shin Kotaro Makaritoru! Jududouhen Chapter 49
Shinmai Maou no Testament Arashi Chapter 24
Shuukyuu Shoujo Chapter 42
Sidonia no Kishi Chapter 59
Signal 100 Chapter 2
SS Sisters Chapter 21
Stalker Joker Chapter 9
Stalker Jokers Chapter 29
Strange Mansion Chapter 6
Strawberry Marshmallow Chapter 9
Sundome Chapter 61
Takachiho Honoka-senpai ga Sukide Sukide Iroiro Gamandekinai. Chapter 1
Takachiho Honoka-senpai ga Sukide Sukide Iroiro Gamandekinai. Chapter 5-6
Take Moon Chapter 4 (off-screen toilet use, nothing explicit)
Task Force For Paranormal Disaster Management Chapter 5
Tatoeba Last Dungeon Mae no Mura no Shounen ga Joban no Machi de Kurasu Youna Monogatari Chapter 16
Tensei Kyousouba H-MAN Chpater 4
The Basketball Girl Chapter 66 (this is a manhua)
The Fable Chapter 9
The One Chapter 39
The Secret Etiquette of Lady Takashima Chapter 1
The Serious Succubus Hiiragi-san 24
Tsukasa-chan ni Utawareru! Chapter 27
Twins Game (One-Shot, 2nd part)
Under Ninja Chapter 7 (there's also a toilet scene in one of the newer chapters)
Uso-Bitch Senpai Chapter 6
Virgin's Empire Chapter 255
Virgins' Empire Chapter 1.5
VS Evil Chapter 2
Yamanko Chapter 15
Yamanko Chapter 4
Yamanko Chapter 9
Yotsunoha Chapter 4
Yuuko-chan 100 Renpatsu!! Chapter 15
トトちゃんとランデブウ Chapter 1 (Rookie Jump)
人妻の唇は缶チューハイの味がして Chapter 6.2 onwards
教え子がAV女優、監督はボク。 Chapter 3
青春初日 Chapter 9
시골 처녀들과 불끈한 밤 농사 6 (I am not sure what the Japanese title is)