disclaimer: tags/genres grabbed from aniDB and/or ANN. I haven't watched the anime myself yet.
comedy action romance sci-fi school life drama fantasy adventure ecchi short episodes sequel
B - The Beginning
In a world powered by advanced technology, crime and action unfold in the archipelagic nation of Cremona. Koku, the protagonist. Keith, the legendary investigator of the royal police force RIS. A mysterious criminal organization. A wide variety of characters race through the fortified city as it is beset by the serial killer, Killer B, and a chain of crimes.
mystery, sci-fi
A.I.C.O. -Incarnation-
In Japan in the year 2035, an accident known as the "Burst" occurs during a research project, spawning an out-of-control artificial life form called "Matter" that has spread throughout the Kurobe Gorge. The research city that was once hailed as the hope for humanity is cordoned off by the government. Two years later, 15-year-old Aiko Tachibana, who lost her family in the Burst, learns something unbelievable from Yuya Kanzaki, a new student at her school. A secret is hidden within her body, and the answer to the puzzle lies at the "Primary Point" that was the center of the Burst. Aiko resolves to infiltrate the restricted area, escorted by a team of divers and with Yuya as her guide.
sci-fi
Sword Gai - The Animation
Gai was born beside a woman who met her death in a forest. He was adopted by the swordsmith Amon. A few years later, Gai becomes Amon’s apprentice, and during the forging of a sword, he loses his right arm. To help him, Amon crushes the demon sword ShiryĆ« (lit. Death Dragon) to form it into Gai’s replacement right arm. Gai then is able to fuse with the weapon on his arm, and fights against his enemies.
action
SNS Police
The SNS Police (Social Network Service Police) protect the peace in social media sites like Twitter and Facebook and deal harsh justice to those who violate it.
[short 6min]
Juushinki Pandora
On the day the Xianglong (Shanron or Soaring Dragon) Crisis occurred in 2031, Leon Lau was right in the middle of the unfolding events. The Quantum Reactor, a next generation energy device developed to replace dwindling environmental resources, exploded and unleashed an unknown energy. As a result, the global environment changed overnight. Living things (besides humans) and machines each underwent their own unique evolution, and the B.R.A.I. (Biological Revolutionary of Accelerated Intelligence) entities in particular evolved and came into being. Because of them, humanity was driven to the brink of extinction. Humans fight the B.R.A.I with M.O.E.V. (Multi-purpose Organic Evolution Vehicle) variable units.
sci-fi
Lost Song
Rin is an energetic girl who loves to eat and lives in a verdant frontier village. Deep within the royal palace in the bustling capital city, the songstress Finis spends her days in solitude. Both share a special power no other person has. A miraculous power that can heal wounds, create water and stir the wind -- the power of song. Guided by destiny, the two young women each face an arduous journey with the power of song. The shadow of war looms over the kingdom, tainting even the miraculous songs with the blood of innocents. Loved ones meet their deaths as silent screams echo through a stone prison.
fantasy
Gegege no Kitarou (2018)
Nearly twenty years into the 21st century, people have forgotten the existence of Yokai. When a number of unexplainable phenomena plague adults of the human world with confusion and chaos, thirteen-year-old Mana writes a letter to the Yokai Post in search of answers, only to be greeted by Ge Ge Ge no Kitarou...
supernatural, [remake]
Nil Admirari no Tenbin - Teito Genwaku Kitan/Libra of Nil Admirari
In an alternate timeline, Japan’s Taisho era lasted until 1936 instead of ending in 1926. During this time, the heroine agrees to an arranged marriage to save her family’s honor, but before following through, her brother commits suicide by fire while holding an old book. Before she can make sense of this tragedy, the Imperial Library Information Assets Management Bureau appears and informs her of books called Maremono, which exert a great influence on those who read it.
romance
Uma Musume: Pretty Derby
In a world very much like our own, great race horses of the past have a chance to be reborn as "horse girls" - girls with the ears and tails of horses as well as their speed and endurance. The best of these horse girls go to train at Tokyo’s Tracen Academy, hopefully moving on to fame and fortune as both racers and idols. Special Week, a high school horse girl from the countryside, has just transferred to Tracen, and she’s determined to fulfill her promise to her mother to become the best horse girl in Japan. On her way to school, she takes a pit stop at the race track and instantly falls in love with Silence Suzuka’s style, becoming determined to race on the same team as her.
sports, animal-girls
Amai Choubatsu - Watashi wa Kanshu Senyou Pet
Inside a prison in the near future, Hina Saotome - an office lady imprisoned despite her innocence - meets the elegant yet sadistic guard Aki Myojin. Hina’s heart and body are at the mercy of Myojin’s "cruel yet sweet domination" from physical examinations to even her lover’s prison visits.
[ecchi TV, H web version], [short]
PazuDora/Puzzle & Dragon

[spinoff?], [for kids?]
Omae wa Mada Gunma o Shiranai
Nori Kamitsuki moves from Chiba Prefecture to a fictionalized version of Gunma Prefecture northwest of Tokyo. Before moving to Gunma, Kamitsuki only sees that the prefecture has a fearsome reputation on the net. Upon moving, he soon makes contact with the people who hold a strong love of Gunma’s culture.
comedy, [short 5min]
Mahou Shoujo Ore/Magical Girl Boy
Saki Uno is a high school girl and rookie idol who has a crush on Mohiro, her best friend’s older brother. When Mohiro is kidnapped by demons, Saki hastily makes a shady contract to be able to transform into a magical girl, which transforms her body into that of a handsome man.
magic
Kakuriyo no Yadomeshi
A female college student named Aoi inherits the ability to see spirits from her late grandfather. Aoi prides herself on her cooking, and one day she’s feeding some agricultural spirits when suddenly a god and the master of the "Tenshinya" (Heavenly Inn) appears and takes Aoi away. He says that due to her grandfather’s debts, she must become his bride. Aoi hates this idea and instead declares that she will pay back her grandfather’s debt by working at the Tenshinya.
supernatural
Uchuu Senkan Tiramisu/Space Battleship Tiramisu
Subaru Ichinose is the ace pilot of the space battleship "Tiramisu." Since he cannot get used to being surrounded by older pilots, Subaru shuts himself in the cockpit of his personal ship "Durandal."
comedy, sci-fi, [short 10min]
Captain Tsubasa (2018)

sports, football, [remake]
Ginga Eiyuu Densetsu- Die Neue These - Kaikou/Legend of the Galactic Heroes (2018)
A few thousand years in the future, humans have begun to immigrate into space. These space colonies where split into two countries with opposing government organizations called the Galactic Empire--an autocracy--and the Free Galaxy Alliance--a democracy. These two nations fight together in the endless galaxy for over 150 years. The two nations continue to fight. The Galactic Empire is beginning to crumble due to its society of nobles. On the other hand, the abuse of the democratic system has turned the country’s politics into a mobocracy. At the end of the eighth century in the space calendar, history begins to chance due to the appearance of two people: the invincible genius Reinhard von Lohengramm, and the never-losing magus Yang Wen-Li. With each controlling an opposing force, they find themselves clashing again and again.
sci-fi, military, [remake]
Tachibana-kan to Lie Angle
After moving back to her hometown, Natsuno Hanabi is ready to start high school and excited to be living in Tachibana Mansion, a luxurious mansion-style dormitory. However, due to some complications, she winds up at run-down but lively Tachibana House and finds herself stuck between her childhood friend and a mysterious beauty.
romance, shoujo-ai, [short]
3D Kanojo - Real Girl
Hikari Tsutsui is a high school boy who is satisfied with the virtual girls he encounters in anime and games. He does not have many friends and he lives in his own world. One day, when he is stuck on pool cleaning duty, he is approached by Iroha, a "real girl" who is showy and popular with boys.
romance
Alice or Alice - Siscon Niisan to Futago no Imouto
Twin sisters Rise and Airi live a fun-filled life with their older brother who is slightly attracted to them.
comedy, slice of life, [short 5min]
Aikatsu Friends!
Aine Yuuki is good at making friends, and is enrolled in Star Harmony Academy’s general education track. She befriends Mio Minato, the school’s top idol, and becomes an idol herself.
idols, [spinoff]
Tada-kun wa Koi wo Shinai
Mitsuyoshi Tada, a boy who has never known love, is taking pictures of the cherry blossoms in full bloom when he meets Teresa Wagner, a transfer student from Luxembourg. Upon arriving in Japan, she got lost, separated from her travel companion. Mitsuyoshi helps her and brings her to his grandfather’s coffee shop.
comedy, drama, romance
Comic Girls
Moeta Kaoruko ia a 15-year-old high school student and manga creator, who uses the pen name Chaos. After ranking at the bottom of a reader survey, Kaoruko’s editor recommends that she enter an all-female dormitory for manga creators. Kaoruko’s roommates are shoujo manga creator Koizuka Koyume, teen romance manga creator Irokawa Ruki, and shounen manga creator Katsuki Tsubasa. The girls support each other as they work to become better manga creators.
comedy
Megalo Box
JD (Junk Dog) participates in fixed boxing matches in an underground ring in order to live. Today, he enters the ring again, but he encounters a certain person. JD wants to take on a challenge that risks everything.
sci-fi, boxing
Saredo Tsumibito wa Ryuu to Odoru - Dances with the Dragons
Gayus and the beautiful but cruel sword-wielder Gigina are "special equationists," individuals that manipulate the equations that govern world’s laws thus allowing fantastic and deadly results. These two bounty hunters are caught up in a battle with dragons in the city of Eridana and in the intrigue of great nations.
fantasy
Hinamatsuri
One night, a strange object falls on the head of Nitta, a member of the yakuza. Inside the box is a strange young girl named Hina. She has tremendous supernatural powers, and Nitta finds himself reluctantly taking her in. Her powers can come in handy for his yakuza business, but he also runs the risk of her using them on him! Not to mention, if she doesn’t use her powers, she will eventually go berserk and destroy everything around her. Nitta and Hina’s strange life together is just beginning...
comedy, supernatural
Akkun to Kanojo
Atsuhiro "Akkun" Kagari is extremely tsundere. Akkun’s behavior is harsh towards his girlfriend Non "Nontan" Katagiri with verbal abuse and neglect, but he actually is head-over-heels for her and habitually acts like a stalker by tailing her or eavesdropping. Nontan is oblivious to Akkun’s stalker ways, and thinks his actions are cute.
comedy, romance
Gurazeni
Bonda Natsunosuke is a relief pitcher in Tokyo Spiders. In his eighth pro season, he makes 18 million yen at age 26. But he is always troubled by how little he makes, given that he is surrounded by high income earning baseball players. This is a relief pitcher’s story in Nippon Pro Baseball, his envies, worries, sweat and tears.
sports, baseball
Mahou Shoujo Site
Aya Asagiri is a young girl who has fallen victim to bullies at her school. Looking for a way to escape her troubles, she looks to the Internet for distraction, when a mysterious website called "Magical Girl Site" appears. Simply viewing the page is all it takes to hurtle Aya headlong into the deadly world of the Magical Girl Apocalypse. There, it’s fight or die, against a seemingly endless array of savagely adorable, frilly-skirted killing machines, each armed with magical powers and an unquenchable thirst for blood and chaos.
action, drama, horror, magic, psychological, thriller
Devils Line
Tsukasa, a college student, is rescued from an attack by a devil, one of many vampires that can blend in among the human population. Anzai, her savior, is a half-devil who exploits his supernatural gifts as a member of a shadowy police task force that specializes in devil-related crime in Tokyo. As Anzai continues to keep guard over Tsukasa, the two quickly forge a tentative bond - one that Anzai fears will test his iron-clad rule of never drinking human blood.
supernatural
Persona 5 The Animation
In April, Ren Amamiya transfers schools for mysterious reasons - something to do with him getting a criminal record for committing grave bodily harm, with the conditions of his probation being to attend a new school far away. A friend of his parents named Sojiro Sakura agrees to take the boy in for reasons of his own, so a reluctant Ren begins his new life. He deletes a mysterious red app from his phone before arriving at Sojiro’s house, but the app reappears as he’s going to bed for the night. He dreams of a strange place known as the Velvet Room where a man named Igor tells him that there’s a way to break free of the chains binding him. The next day, when another red screen on a new classmate’s phone leads them into a trap, a persona know as Arsene appears to help Ren. Somehow, all of this will lead to Ren falling back into police custody by November.
mystery
Wakaokami wa Shougakusei!
Okko" is a sixth-grade elementary school girl who lost her parents in a traffic accident. She moves to her grandmother’s hot spring inn "Haru no Ya" (Spring House) and trains to run the inn. She gradually grows up with the help of the ghost "Uri-bou" and other mysterious friends.
school life, supernatural, [short 15min], [for kids?]
Layton Mystery Tanteisha - Katri no Nazotoki File
Katrielle "Kat" Layton is the daughter of famed sleuth Professor Hershel Layton. Like her father, Kat also solves mysteries alongside her talking dog, Sherl.
comedy, mystery
Kiratto PriChan
Two first-year middle school girls named Momoyama Mirai and Moegi Emo are aspiring idols who decide to use the "Pri-Chan System," a system used by famous people and companies to broadcast content. Like many girls starting their own channels and uploading content, the pair decide to become their own producers, starting their own channel in an attempt to become Pri-Chan idols.
idols, [spinoff]
Cutie Honey Universe
Kisaragi Honey is an amazingly humanlike and fashion conscious android with the unique ability to transform her body into a wide range of outrageous yet stylish disguises, each of which comes with its own dazzling super ability. After a run-in with a sinister secret criminal cabal organization, Panther Claw, the luscious and law-abiding Honey makes it her mission to bring them down.
[spinoff?/reboot?]
Caligula
Tadashi Satomi is a virtual idol known as mu who performs user-inputted songs and gains self-awareness through exposure to users’ bitter feelings and dissatisfaction toward reality. Wanting to save humanity - which she believes is continuously suffering - she lures people to a virtual reality world called Mobius with her songs. She then imprisons them in Mobius, thinking they will be free from the suffering of reality and that all their wishes will come true. Nine members of the "Going Home Club," a club that was formed because the characters want to escape from Mobius and go home, try to find a way out.
sci-fi
Piano no Mori
Kai was born as the son of a prostitute and he’s been playing the abandoned piano in the forest near his home ever since he was young. Shuuhei, on the other hand, was practically breast-fed by the piano as the son of a family of prestigious pianists. Yet it is their common bond with the piano that eventually intertwines their paths in life.
music, [remake of movie]
Jikken-hin Kazoku - Creatures Family Days

sci-fi, family, half-humans
Golden Kamuy
In the early twentieth century, Russo-Japanese War veteran Sugimoto "Immortal" Saichi scratches out a meager existence during the postwar gold rush in the wilderness of Hokkaido. When he stumbles across a map to a fortune in hidden Ainu gold, he sets off on a treacherous quest to find it. But Sugimoto is not the only interested party, and everyone who knows about the gold will kill to possess it! Faced with the harsh conditions of the northern wilderness, ruthless criminals and rogue Japanese soldiers, Sugimoto will need all his skills and luck - and the help of an Ainu girl named Asirpa - to survive.
Fumikiri Jikan/Railroad Crossing Time
Short stories about conversations young women have while waiting at railroad crossings.
slice of life, [short 5min]
Ladyspo

comedy, science fiction, tournament, [short 5min]
Rokuhoudou Yotsuiro Biyori
Four specialists work at a popular Japanese-style tea house called Rokuhoudou. Sui makes the tea, Gure creates latte art, Tsubaki makes the sweets, and Tokitaka cooks. In addition to serving their customers, they sometimes help them solve their problems.
slice of life
Last Period - Owarinaki Rasen no Monogatari
Fantastic beasts called "Spirals" are born from isolation. Those who can defeat the beasts are called "Periods." Haru is an apprentice Period who belongs to the Arc End 8th Branch. However, after a mysterious theft incident, there is an economic collapse, and the Arc End headquarters abandons the 8th Division, leaving only three Periods left, including Haru. Haru and the other two Periods start their work to rebuild the 8th Division.
fantasy
Butlers - Chitose Momotose Monogatari
Koma "Jay" Jinguji is the smart and handsome student council president. His elegant smile captures the hearts of women. Tsubasa Hayakawa is a multi-talented and gentle shop assistant at a cafe. His cafe latte with owl latte art is very popular with female customers. The two men travel through time to fight their archenemy. The charming "Butlers," as they are called, fight supernatural battles and also experience a slapstick comedic life at their academy.
action, comedy, time travel
Hisone to Masotan
Straightforward and innocent Hisone Amakasu is a Self-Defense Force rookie stationed at the Air Self-Defense Force’s Gifu Base. She struggles with the fact that she sometimes hurts people unintentionally by her innocent words and decides to join the Air Self-Defence Force, hoping to maintain a certain distance from people. This decision leads her to a fateful encounter that profoundly changes her life. Hisone meets the "OTF" dragon hidden in the base, and it chooses Hisone as its pilot. When it soars into the sky with Hisone, her fate as a dragon pilot is decided. It is said that dragons have a key to the future of the world.
fantasy, military
Wotaku ni Koi wa Muzukashii
Narumi, a female office worker who hides her fujoshi lifestyle, and Hirotaka, a handsome and capable company man who is secretly a game otaku. The two seem perfect for each other, but love is difficult for a nerd.
comedy, romance
Dorei-ku The Animation
24 people enter a survival game. Each has a device called an SCM (slave control method), which can make their opponent into their slave. Each person has their own reason for participating in the game.
drama, psychological
Isekai Izakaya - Koto Aitheria no Izakaya Nobu
On a deserted street somewhere in Kyoto resides a Japanese style pub called "Izakaya Nobu." But this hole in the wall holds a secret: its entrance is mysteriously linked to another world! Chief Yazawa Nobuyuki and his server, Senke Shinobu, have decided to open up business in this distant and strange land, an ancient city known as "Aitheria." Palace guards, craftsmen, merchants, noblemen... Nobu’s doors are open for business, welcoming one and all with a cold beer and a warm meal!
fantasy
Duel Masters!

[sequel]
Beyblade Burst Chouzetsu

[sequel/spinoff]
Souten no Ken Re-Genesis/Fist of the Blue Sky Regenesis

[sequel], [prequel]
Gundam Build Divers

[sequel]
Shounen Ashibe - Go! Go! Goma-chan 3

[sequel], [short]
Tokyo Ghoul-Re

[sequel]
Lupin III Part 5

[sequel]
Inazuma Eleven - Ares no Tenbin

[sequel]/[spinoff]
Lostorage conflated WIXOSS

[sequel]
Nobunaga no Shinobi - Anegawa Ishiyama-hen

[sequel], [short]
Boku no Hero Academia 3

[sequel]
Major 2nd

[sequel], baseball
Amanchu! Advance

[sequel]
Sword Art Online Alternative - Gun Gale Online

[spinoff]
Hoozuki no Reitetsu 2 - Sono Ni

[sequel]
Koneko no Chi - Ponpora Dairyokou

[sequel], [short]
Shokugeki no Souma - San no Sara - Toutsuki Ressha-hen

[sequel]
Binan Koukou Chikyuu Bouei Bu Happy Kiss

[sequel]
High School DxD Hero

[sequel]
Steins;Gate 0

[sequel]
Youkai Watch - Shadow Side

[sequel]
Full Metal Panic! Invisible Victory

[sequel]
Aggressive Retsuko

[after 1st eps], [sequel]
Cardfight!! Vanguard (2018)

[after 1st eps], [remake]
To Be Heroing

[after 1st eps], [sequel]