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
Double Decker! Doug & Kirill
The city state of Lisvalletta. Two suns rise above this city, and the people here live peaceful lives, but in the shadows crime and illegal drugs run rampant. Among them is the dangerous, highly lethal drug "Anthem" which casts a dark shadow over the city. The SEVEN-O Special Crime Investigation Unit specializes in cracking down on Anthem. This unit operates in two man "buddy" teams in what’s called the "Double Decker System" to tackle the problem. Doug Billingham is a seasoned investigator, and joining him is Kirill Vrubel, whose abilities are mysterious and unknown.
[spinoff], action, comedy, mystery, super power
Akanesasu Shoujo/The Girl in Twilight
Constantly on the lookout for her next big adventure, the cheerful and kind Tsuchimiya Asuka is always ready to try new things with her high school friends from the Crystal Radio Club. One day, the group performs a ritual from an urban myth just for fun. However, several conditions had fallen into place to put the ritual in motion, opening the door to a new world of gold and jet black. In this world, Asuka finds a different version of herself and soon finds out that some doors were never meant to be opened.
sci-fi, parallel world
Tensei Shitara Slime Datta Ken/That Time I Got Reincarnated as a Slime
Lonely thirty-seven-year-old Mikami Satoru is stuck in a dead-end job, unhappy with his mundane life, but after dying at the hands of a robber, he awakens to a fresh start in a fantasy realm...as a slime monster! As he acclimates to his goopy new existence, his exploits with the other monsters set off a chain of events that will change his new world forever!
action,adventure, comedy, drama, fantasy
Ken En Ken - Aoki Kagayaki
In and Nei are two sisters who have wandering the land together ever since their village was destroyed by the villainous Taibai Empire. Their childhood friend, Shou, has been enslaved by the Taibai himself, and uses his brilliance at tinkering and inventing to get by as a slave to the Empire’s whims. One day, In accidentally discovers a legendary sword, which grants her fantastic abilities in combat, and allows her to summon a mystical, mechanical fox spirit named Yun, who is sworn to fight by her side. Meanwhile, Shou is making fast friends with a mysterious young girl who just may hold a great amount of power within the Taibai Empire. As Shou and the Fu sisters find themselves increasingly caught up in the Empire’s battle for supremacy over the land, it will take all of the magic and might that the budding resistance armies can muster to turn the tide of war once and for all.
action, adventure, fantasy, demons
Bakutsuri Bar Hunter
Totta loves to fish. One day a bar soul named Potepen appears from the barcode on Totta’s bag of potato chips. Together, Totta and Potepen use a special "Bakutsuri" bar rod item to fish for other bar souls.
[for kids?]
Jingai-san no Yome
Hinowa Tomari is an ordinary high school boy who is selected to be married to Kanenogi-san, a mysterious, furry creature. While both Tomari and Kanenogi are initially perplexed by this development, they soon find that their married life together is unexpectedly pleasant.
comedy, [short 5min]
Kaze ga Tsuyoku Fuiteiru/Run with the Wind
The Tokyo-Hakone Round-Trip College Ekiden Race or "Hakone Ekiden," one of the biggest university marathon relay races in Japan. The race is held every year on January 2-3 and goes between Tokyo and Hakone and back, for a total run of of nearly 217.9 km. A friendship between two sidelined athletes helps them return to their beloved sport and build a team for a competitive long-distance relay race.
sports
Sora to Umi no Aida/Space Fish - Between the Sky and Sea
In the future in Onomichi, Hiroshima fish disappear from the sea around the world and only whales live in the ocean. The Ministry of Fishery decides to set up giant experimental Universe Fish Tanks in space. The Onomichi Universe Fishery Union is established and begins to train space fishermen. Female fishermen are in demand due to the strengthening of an equal employment law for men and women. Six new female space fishermen are selected, and the story centers on supporting their growth.
sci-fi
RErideD - Tokigoe no Derrida/RErideD - Derrida, who leaps through time
The year is 2050. A young engineer named Derrida Yvain became famous thanks to his contribution to the development of the "Autonomous Machine DZ" at Rebuild, the manufacturing company founded by his father. One day, Derrida and his colleague Nathan discover a flaw in the DZs and try to warn their boss, but are ignored. Although Derrida and Nathan are aware of the danger, they reluctantly decide to put off taking any measures, and instead go to Nathan’s daughter Mage’s birthday party. The next day, after enjoying a peaceful day, Derrida and Nathan are suddenly attacked by unknown forces. At the end of the escape, Derrida falls into a cold sleep machine and 10 years later, he wakes up to a devastated world in the middle of a war. While Derrida is attacked by a group of out of control DZs, he almost gives up, but he recall’s Nathan’s last words. "Take care of Mage." Despite the harsh fate that has fallen upon him, Derrida sets off to seek Mage. Beyond the time, we reunite - this is the story of a journey for hope.
sci-fi
Seishun Buta Yarou wa Bunny Girl Senpai no Yume wo Minai
There is a rumor about a mysterious phenomenon call "puberty syndrome." For example, Azusagawa Sakuta is a high school student who suddenly sees a bunny girl appear in front of him. The girl is actually a girl named Sakurajima Mai, who is Sakuta’s upperclassman who is also a famous actress who has gone on hiatus from the entertainment industry. For some reason, the people around Mai can no longer see her. Sakuta sets out to solve this mystery, and has he spends time with Mai, he learns her secret feelings. Other heroines who have "puberty syndrome" start to appear in front of Sakuta.
comedy, fantasy, romance, school life
Zombieland Saga
The usual mornings. The usual music. The usual self. For seven girls, a peaceful life was all of a sudden destroyed. All at the hands of zombies, dead things that somehow remained moving. Now they step into a new world, whether they liked it or not. A "zombieworld" that represented both the best and the worst. The seven girls had only one wish: "We want to live."
comedy, horror
Devidol!
Three demons are living in the human world: Aira, Shima, and Hana. While they work hard and make friends at school, they pursue their dream of being an idol. However, because none of them know how to be an idol, they keep trying and straying from their goal. Guided by the kind but sometimes strict lecture of Rocket-sensei, they strive to become idols.
[short 15min]
Gakuen Basara - Samurai High School
Anyone who thinks warring samurai and violent power plays in feudal Japan were rough business must have missed Monday mornings in this modern high school! The winds of change have come for the students of Basara Academy. Due to the suspension of their current student council president, Toyotomi Hideyoshi, a new leader must be chosen. Two prominent first-year athletes prepare to battle for the chance to rule the school: baseball elite Date Masamune and soccer star Sanada Yukimura. However, it’s not all fun and games as the two also have to fight other rivals for the top spot. From fierce food-eating contests to brutal sports challenges, who will have what it takes to be the new student council president?
comedy, action, school life, [spinoff]
Bakumatsu
The Bakumatsu was an era in which the souls of young men burned with anxiety for their country’s future. Takasugi Shinsaku, a soldier of fortune from Choshu, sneaks aboard a government ship with his comrade Katsura Kogorou in search of a mysterious "timepiece" with the power to manipulate time that he fears the government wishes to keep for themselves. Rather than allow such power to fall into the wrong hands, Takasugi plans to destroy the artifact, but having obtained it, the artifact is quickly stolen, forcing the pair to follow the mysterious thief to the seat of government in Kyoto. However, when they arrive in the capital, they discover that the government has been overthrown and the deity Susanoo now reigns in its place. The streets of the city and the people in them are much different than Takasugi and Katsura remembered. The times may have changed but their mission hasn’t - Takasugi and Katsura resolve to reset time and save their nation from the nefarious forces trying to hijack it.
action, adventure, sci-fi
Tonari no Kyuuketsuki-san/Ms. vampire who lives in my neighborhood
Human girl Amano Akari is rescued by a vampire, Sophie Twilight, and falls in love with her. She forces herself into Sophie’s home and begins living with her. Though Sophie is a vampire, she never attacks humans, instead buying blood and anime merchandise online like any ordinary person. A modern-day vampire comedy!
comedy, supernatural
Yagate Kimi ni Naru/Bloom Into You
Yuu has always loved shoujo manga and awaits the day she gets a love confession that sends her heart aflutter with bubbles and hearts, and yet when a junior high classmate confesses his feelings to her... she feels nothing. Disappointed and confused, Yuu enters high school still unsure how to respond. That’s when Yuu sees the beautiful student council president Nanami turn down a suitor with such maturity that she’s inspired to ask her for help. But when the next person to confess to Yuu is Nanami herself, has her shoujo romance finally begun?
romance, shoujo-ai
Hinomaru Sumo
It is a divine ritual, a martial art, a combat sport - it’s sumo!! A "small" new student, Ushio Hinomaru, appears before the weak little sumo club of Oodachi High School! The words "big" and "heavy" are the rules to this sport, which does not fit this newbie any inch, but this guy goes and does what...!? Ushio and the small sumo club climbs its way to the top! The goal is Hinoshita Kaisan, a title for the highest rank in professional sumo, equivalent of Yokozuna.
sumo
Kitsune no Koe/Voice of Fox
Hu Li is a poor but talented high school boy. He is a "ghost" singer/songwriter for the popular and narcissistic boy idol Kong Que, who is very handsome but can barely sing. Hu always wears a fox mask to hide his large facial scar caused by a traffic accident. He also uses a screen name "Mr. Fox" to publish his music online.
music, [short 15min]
Uchi no Maid ga Uzasugiru!
Takanashi Misha is a second grade elementary school girl whose father is Japanese and mother was Russian. After she lost her mother at an early age, she has lived alone with her father. One day, a new maid named Kamoi Tsubame comes to their house to serve as their maid. She was a former master sergeant of Japan Air Self-Defense Force, and her biggest problem is that she is a lolicon who is deeply attracted to Misha.
comedy, ecchi
Dakaretai Otoko 1-i ni Odosarete Imasu./DAKAICHI -I'm being harassed by the sexiest man of the year-
Saijyo Takato has reigned as the idol industry’s "Most Huggable" for five years, that is, until freshman actor Azumaya Junta appeared. Takato was always considered brusque while Azumaya’s smile is winning over admirers by comparison. The whole fiasco drives Takuto to over indulge in alcohol and his actions catch the attention of the last person he wants to see. To his surprise, Azumaya uses this new info to blackmail Takuto for physical affection.
romance, shounen-ai
Kishuku Gakkou no Juliet
"To Love, or not to Love" Juliet Percia and Inuzuka Romio are archenemies. They lead two high-school dormitories the "Black Dogs" and the "White Cats" from two rivaling countries. Both factions are dead set on defeating the other to gain control over the island they have to share. Beneath the feuding exterior, however, Percia and Inuzuka long for love and peace for their budding relationship...
comedy, romance, school life
Okoshiyasu, Chitose-chan
A penguin named Chitose takes in the sights and food of Kyoto.
comedy, slice of life, [short 5min]
Irozuku Sekai no Ashita kara
In Nagasaki, a descendant of mages, 17-year-old Hitomi lost her sense of color at a young age and grew up lacking emotion. Her grandmother Kohaku, a great mage, sends Hitomi to the past, to the year 2018. There, she spends time with a 17-year-old Kohaku and friends from club activities.
magic, drama, romance
Hoshi no Shima no Nyanko
The story centers on the cats Hopi, Toto, and Mao, who set out on the ocean in search of a place to establish a new town. The three friends plan to find the mysterious "Island of Stars." When they happen to chance upon it, they immediately get to work developing the island, but encounter many difficulties in their task.
[short]
Radiant
Seth is an aspiring sorcerer from the Pompo Hills area. Like all wizards, he is an "infected": one of the few living beings who survived the contact of the Nemesis, these creatures fallen from the sky that contaminate and decimate all those they touch. His apparent immunity made him choose a path which seemed to him to be all the more appropriate: to become a Hunter and to fight the Nemesis. But more than that, Seth wants to engage in a quest that goes beyond the simple hunt for monsters... He wants to find the Radiant, their presumed cradle. Surrounded by a faction of sorcerers, he traveled the world in search of the Radiant, under the terrible eye of the Inquisition...
fantasy
SSSS.Gridman
Yuta Hibiki awakens with amnesia and the ability see things that others cannot. He first encounters a Gridman in the reflection of his friend Rikka Takarada’s computer and it tells him to "Remember his calling," but Yuta doesn’t understand what this means. Later, in the distance, he sees an extremely large monster but it doesn’t move. It’s only when Yuta gets to school that the two sightings make sense: a monster attacks and the hero Yuta saw in the computer screen pulls him within the computer and transforms Yuta into a giant hero named Gridman.
sci-fi
Goblin Slayer
"I’m not saving the world. I’m just killing goblins." At the guild on the frontier, someone has accomplished a rare feat, rising to become a Silver-ranked adventurer solely by hunting goblins... Priestess, a newly minted adventurer, joined her first party only to meet with disaster. The man who saved her is called Goblin Slayer. He uses whatever means necessary, sparring no expense or effort to exterminate all goblins. Around him, he gathered a priestess he vexed, an ever-affable lady guild worker, and his childhood friend, farm girl. In the midst of everything, an elven girl who’s heard rumors about him appears with a request...
adventure, fantasy
Sono Toki, Kanojo wa.
The story takes place in Fukuoka and follows the love lives of four female protagonists as high school students, college students, and as working adults.
romance, slice of life[short 3min]
Release the Spyce
A lone high school girl named Momo is attending a high school in the city of Sorasaki. Unbeknownst to everyone, Momo is an agent who works for the private intelligence agency Tsukikage, that protects the city and its people. Under the tutelage of her senior Yuki, and her other friends, they keep the peace in the city.
action, spies
Ulysses - Jeanne d'Arc to Renkin no Kishi
During France’s Hundred Years’ War with England, Montmorency, the son of a noble, immerses himself in the study of magic and alchemy at a school for knights. However, after France’s defeat at Agincourt, the school is disbanded and Montmorency is forced to flee. While on the run he meets a miraculous village girl named Jeanne.
action, comedy, ecchi, fantasy, magic
Anima Yell!
Hatoya Kohane is a young woman who loves to be helpful to others. After she moves from middle school to high school, she becomes fascinated with cheerleading, and she starts a cheerleading club at her high school. Joining Kohane in her cheerleading activities is the experienced Hizume and Kohane’s childhood friend Uki.
comedy, school life, sports
Shuudengo, Capsule Hotel de, Joushi ni Binetsu Utawaru Yoru.

[short 5min], [echhi TV ver - H web ver]
Gaikotsu Shotenin Honda-san
A skeleton named Honda works in a bookstore. Hilarity ensues daily in his work at the shop’s manga counter.
comedy, [short 15min]
Himote House
Five girls and one cat are all living as housemates in Nakano, Tokyo: the three Himote sisters (Tokiyo, Kinami, and Kokoro) whose family manages the "Himote House," Kokoro’s classmates Tae and Minamo, and the cat Enishi. The girls live their daily lives trying to figure out ways to be popular, and they (and the cat) all possess a mysterious secret power.
comedy, slice of life
Hashiri Tsuzukete Yokattatte./I'm glad I could keep running
Minato goes to an anime event that has a voice acting recital with a friend. He is fascinated by the talent of the voice actors, and he meets Chikako, who studies at the Suid-bashi Animation Academy.
drama, slice of life[short 15min]
Conception
On his high school graduation day, Itsuki’s cousin, Mahiru, tells him that she’s pregnant. Just then, a gate of light emerges and transports the two into the world of Granvania. In this land, "Impurities" have been causing a disturbance to the Stars, ultimately plunging Granvania into chaos and disorder. And Itsuki, now revealed to be one who is fated to meet with the "Star Maidens", is seen as Granvania’s last hope and was thus given the task to produce "Star Children" and combat the "impurities". And unless the task is complete, Itsuki may never be able to return home.
adventure, fantasy, harem
Ore ga Suki na no wa Imouto dakedo Imouto ja Nai
The story centers around the younger sister Nagami Suzuka and the older brother Yuu. Suzuka is a beautiful third-year middle school student who has excellent grades and is the student council president. She wrote a novel about a little sister who dotes on her older brother, and the the novel wins a light novel award. After they discuss the matter, Yuu is the one who debuts as a proxy light novel author instead of Suzuka, under the pen name Chikai Towano.
comedy, romance, school life
Beelzebub-jou no Okinimesu mama./As Miss Beelzebub Likes.
Mullin lands his dream job with the demon king he’s always held in awe, but when his tenure begins, it turns out the demon king isn’t quite what he expected. Beelzebub is a hardworking female demon but her dedication to her job is only rivaled by her love for everything fluffy.
comedy, supernatural
Karakuri Circus
Masaru has just inherited a big fortune after the death of his father. However, people are trying to get their hands on it by any means necessary, even if it means killing him. Narumi helped Masaru from being kidnapped after fighting some weird guys. He found out that they’re not humans but wooden puppets with amazing strength. After a hard fight, Narumi was forced to admit that he’s no opponent for them; and just when he started to think that Masaru would be captured, Shirogane, Masaru’s watcher arrives from France with a weapon, the puppet Arlequin. Here, begins the story of Karakuri Circus.
adventure, mystery
Merc Storia - Mukiryoku Shounen to Bin no Naka no Shoujo
In a world where humans and monsters co-exist, a boy apprentice with the power to heal those who clash, embarks on a journey to restore the memories of his friend Merc, a girl trapped in a bottle.
fantasy
Ingress
CERN has discovered a new kind of matter, dubbed eXotic Matter (XM) that can affect the human psyche. Researching XM is the Hulong Group, a company that on the outside appears to be merely a scientific organization but is actually invested in controlling XM and theoretically, other humans. Researcher Sarah Coppola has mysterious abilities and attempts to blow the whistle on the operation but is captured, but not before the incident turns deadly. Freelance psychic investigator Makoto Midorikawa can see memories belonging to objects. He touches the comatose Sarah’s ring and gets his first clue about what happened within Hulong HQ. Makoto is quickly dragged into globe-trekking war for power when he teams up with Sarah and a bodyguard named Jack.
[after 1st eps], sci-fi
Tsurune - Kazemai Koukou Kyuudoubu
Minato Narumiya is beginning his freshman year at the local Kazemai High School. Mr. Tommy, adviser to the Japanese archery Club, is keen to recruit Minato, as well as his childhood friends Seiya Takehaya and Ryohei Yamanouchi. Ryohei convinces the reluctant Minato to attend the Club’s orientation, where he also meets Kaito Onogi and Nanao Kisaragi. Singling Minato out, Mr. Tommy introduces him as a rare Japanese archery talent and asks him to demonstrate in front of everyone. However, Minato’s arrow fails to hit the mark because he is afflicted by a serious condition.
[after 1st eps], school life,clubs
Han-Gyaku-sei Million Arthur

[after 1st eps], fantasy
Kirakira Happy Hirake! Cocotama

[sequel]
Souten no Ken Re:Genesis 2

[sequel]
Uchuu Senkan Tiramisu II

[sequel], [short]
Inazuma Eleven - Orion

[sequel]
Toaru Majutsu no Index III

[sequel]
Gurazeni 2

[sequel]
JoJo no Kimyou na Bouken: Ougon no Kaze

[sequel]
Gyakuten Saiban 2

[sequel]
Sword Art Online - Alicization

[sequel]
Fairy Tail (2018)

[sequel]
Golden Kamuy 2

[sequel]
Idolmaster Side M - Wake Atte Mini!

[spinoff], [short 6min]
Tokyo Ghoul - Re 2

[sequel]
Senran Kagura - Shinovi Master - Tokyo Youma-hen

[sequel]