Synopsis
In 2017, a short anime film called Hypersonic Music Club was produced in Japan. It was directed and written by Osamu Kobayashi, a veteran of the industry who passed away in April 2021. For various reasons, this short anime was never released. It was made public on August 1, 2023.
You might also like

Iroha's life gets knocked off its orbit when Kaguya, a carefree runaway from the Moon, moves in and convinces her to perform in a virtual world together.
Cosmic Princess Kaguya!

Totsuko is a high school student with the ability to see the 'colors' of others. Colors of bliss, excitement, and serenity, plus a color she treasures as her favorite. Kimi, a classmate at her school, gives off the most beautiful color of all. Although she doesn't play an instrument, Totsuko forms a band with Kimi and Rui, a quiet music enthusiast they meet at a used bookstore in a far corner of town. As they practice at an old church on a remote island, music brings them together, forming friendships and stirring affections.
The Colors Within

In an abandoned Tokyo overrun by bubbles and gravitational abnormalities, one gifted young man has a fateful meeting with a mysterious girl.
Bubble

As Nobita, Gian, Shizuka, and Suneo are making their own space movie, a fleeing bug-sized alien president makes his way to Earth, and needs the help of the kids and Doraemon to stop an oppressive dictatorship threatening his democracy.
Doraemon: Nobita's Little Star Wars

A secret military project endangers Neo-Tokyo when it turns a biker gang member into a rampaging psychic psychopath that only two teenagers and a group of psychics can stop.
Akira

Sewashi and Doraemon find themselves way back in time and meet Nobita. It is up to Doraemon to take care of Nobita or else he will not return to the present.
Stand by Me Doraemon

Satomi is fine being alone until an AI named Shion joins her class with a song and a promise to make her happy. While Shion’s musical numbers and princess gowns don’t quite pass as human, her antics bring Satomi closer to four other classmates. Together, they make memories worth saving, but even our most precious data can be erased.
Sing a Bit of Harmony

The seven short films making up GENIUS PARTY couldn’t be more diverse, linked only by a high standard of quality and inspiration. Atsuko Fukushima’s intro piece is a fantastic abstraction to soak up with the eyes. Masaaki Yuasa, of MIND GAME and CAT SOUP fame, brings his distinctive and deceptively simple graphic style and dream-state logic to the table with “Happy Machine,” his spin on a child’s earliest year. Shinji Kimura’s spookier “Deathtic 4,” meanwhile, seems to tap into the creepier corners of a child’s imagination and open up a toybox full of dark delights. Hideki Futamura’s “Limit Cycle” conjures up a vision of virtual reality, while Yuji Fukuyama’s "Doorbell" and "Baby Blue" by Shinichiro Watanabe use understated realism for very surreal purposes. And Shoji Kawamori, with “Shanghai Dragon,” takes the tropes and conventions of traditional anime out for very fun joyride.
Genius Party

The embodiment of ultimate evil, a glowing orb terrorizes a young girl with bizarre stories of dark fantasy, eroticism and horror.
Heavy Metal

Revival of Evangelion is a re-edit of the Neon Genesis Evangelion films , released in 1998. It consists of Evangelion: Death (which was essentially a clip show that summarized the entire regular series) and The End of Evangelion , re-edited together to make a version that tells the entire story of Evangelion. It is considered to be the final form of the Evangelion films.
Revival of Evangelion

After failing to avenge her father's murder, Princess Scarlet, wakes up in the "Land of the Dead." In this world filled with madness, if she does not achieve her revenge against her nemesis and reach the "No End Place," she will become "Void" and cease to exist. Can Scarlet find a way to live at the end of her endless journey?
Scarlet

High school student Dai Miyamoto has his life is turned upside down the day he discovers jazz. Picking up a saxophone and leaving his sleepy hometown for the bustling nightclubs of Tokyo, Dai will find that the life of a professional musician isn’t for the faint of heart, as he must confront what it truly means to be great.
Blue Giant

After being brutally murdered in a subway station, a teen boy awakens to find himself resurrected by a strange computer named Gantz, and forced to fight a large force of invading aliens in Osaka.
GANTZ:O

In the legendary past, before Poké Balls were invented, an aura-guiding hero Pokémon named Lucario sensed two groups of armies about to clash, and a threat of a massive war in front of Oldoran Castle in Kanto that would leave no survivors. He transferred this message to his master, the legendary hero Arlon, while he was being attacked by a violent group of Hellgar. During the battle, his sense of sight was lost and he was rendered unable to see. He used the detection of his Aura, and so with the offensive Wave Bomb, he eliminated them. Though by the threat, the queen of Rota, Lady Rin was resolute to die with her civilians, and so Arlon made a choice.
Pokémon: Lucario and the Mystery of Mew

A highly experimental film presenting a story out of chronological order taking place 15 years after a near-apocalyptic catastrophe, about four traumatized 14 year olds who are tasked with piloting massive humanoid decisive weapons called Evangelion, the psychologically maladjusted adults who handle and command them, and the events and forces that affect them or which they take part in as they engage massive hostile invaders known as "Angels."
EVANGELION: DEATH (TRUE)²

Gaea is a mythical realm ruled by sword and sorcery and immersed in blood and violence. Thrust into a conflict she doesn't quite understand, Hitomi Kanzaki helps aid the young Prince Van as they embark upon a journey to fight the Black Dragon Clan. The battle over a legendary suit of dragon armor, Escaflowne, has begun.
Escaflowne: The Movie

Nobita travels to the future to show his beloved grandma his bride, but adult Nobita has fled his own wedding.
Stand by Me Doraemon 2

Colin MacLeod hunts for the man responsible for the death of his love. He chases the immortal Marcus Octavius across centuries as his quest threatens to take over his life and heart. In his quest, he meets a woman who reminds him of his slain beauty. But it's his final battle with Marcus that will decide not only his fate, but also the fate of everyone in the world.
Highlander: The Search for Vengeance

The DigiDestined go to a nearby hot springs theme park and everyone has a good time, but Joe doesn't show up because he wants to study for his exams. Another infected Digimon, Ogremon, attacks Odaiba. Gomamon runs away from home while Mimi faces problems with the other DigiDestined and her classmates because of her selfish ideas.
Digimon Adventure tri. Part 2: Determination

When the evil Yo-Kai Kin, Gin and Bronzlow makes the Yo-Kai Watch disappear from time so they can help Dame Dedtime prevent humans and Yo-Kai from being friends, Nate Adams finds help in the Yo-Kai Hovernyan, who takes Nate, Whisper and Jibanyan 60 years to the past, when the Yo-Kai Watch was first invented by Nate's grandfather, Nathaniel Adams, while he was a boy. Together, the 2 boys fight Dame Dedtime and her evil Wicked Yo-Kai minions to save the world from her evil plans.