Like a Dragon: Ishin!

Ryū ga Gotoku Ishin! is set in the 1860s Japan during the Bakumatsu era at the end of the Edo period. Japan is thrown into turmoil after the arrival of Western ships, galvanizing the imperialist ideals of the Shishi, who wish to rebuild the nation around the Emperor by overthrowing the Bakufu and expelling foreigners. The game features an open world focusing on a powerful feudal domain and castle town in east Japan, Tosa, and Japan's capital city at the time, Kyo. Kyo is divided into several key areas: the hospitality district Fushimi, the red light district Gion, the bustling Rakunai, the deserted Rakugai, and the perilous Mukurogai. The Shinsengumi, a notorious police force organized by the Bakufu, are headquartered in Kyo, where the majority of the game takes place.

Ishin! features an ensemble cast, the majority of whom are loosely based on real Japanese historical figures. The majority of the characters' appearances are adapted from various existing characters in the Like a Dragon franchise. The primary protagonist of the game is Sakamoto Ryōma (Takaya Kuroda), a disgraced rōnin from Tosa who seeks to avenge his murdered adoptive father, Yoshida Tōyō (Unshō Ishizuka). Escaping to Kyo as a wanted man, Ryōma joins the Shinsengumi using the alias Saitō Hajime, in order to track down Tōyō's murderer. Notable members of the Shinsengumi include: Chief Kondō Isami (Eiichiro Funakoshi/Akio Otsuka), Deputy Chief Hijikata Toshizō (Nakamura Shidō II), Military Advisor Itō Kashitarō (George Takahashi/Hitoshi Ozawa), Inspector Yamazaki Susumu (Nobutoshi Canna/Yuichi Nakamura), and the Division Captains: Okita Sōji (Hidenari Ugaki), Nagakura Shinpachi (Rikiya Koyama), Matsubara Chūji (Hiroki Tōchi), Takeda Kanryūsai (Shun Sugata/Riki Takeuchi), Inoue Genzaburō (Shunsuke Sakuya), Tani Sanjūrō (Kenji Hamada/Masanori Takeda), Tōdō Heisuke (Shunsuke Daito/Nobuhiko Okamoto), Suzuki Mikisaburō (Ryōta Takeuchi/Ayumi Tanida), and Harada Sanosuke (Hiroki Yasumoto).

Ryōma is also supported by other allies, including: Katsura Kogorō (Koichi Yamadera), leader of the Chōshū Loyalist Party; Saigō Kichinosuke (Masami Iwasaki), General Commander of the Satsuma Domain Army; Nakaoka Shintarō (Kazuhiro Yamaji), Tōyō's former retainer who cooperates with Ryōma to investigate Tōyō's death; Otose (Romi Park), the proprietor of Teradaya Inn where Ryōma stays at during his time in Kyo; Oryō (Nanami Sakuraba/Manami Sugihara), a young woman who works at Teradaya as Otose's apprentice; the Bathkeeper of Sai (Yoshiaki Fujiwara), a renowned information broker in Kyo; and Ikumatsu (Aya Hirano), a geisha who operates as a spy for the Chōshū Loyalist Party.

The primary antagonist of Ishin! is Takechi Hanpeita (Katsunori Takahashi/Hideo Nakano), Ryōma's sworn brother who commands the Tosa Loyalist Party following Tōyō's death. Takechi is supported by his right-hand man, Okada Izō (Kazuhiro Nakaya), a notorious assassin also known as "Izō the Butcher". Other antagonists include: Sasaki Tadasaburō (Rintarō Nishi), commander of the shogunate police force Mimawarigumi; Katsu Rintarō (Kenyu Horiuchi/Kohsuke Toriumi), Admiral of the Bakufu Navy; Tokugawa Yoshinobu (Satoshi Tokushige), the 15th Shogun of the Tokugawa clan; and Yamauchi Yōdō (Hiroaki Yoshida), the ruthless daimyo of the Tosa Domain.

In 1866, after finishing sword training in Edo, Sakamoto Ryōma returns to his hometown in Tosa and reunites with his adoptive father, Yoshida Tōyō, and his sworn brother, Takechi Hanpeita. Tōyō, who is a government magistrate, seeks to end the rigid social class system in Tosa, and implores Ryōma to aid his cause by joining the Tosa Loyalist Party. Ryōma, Takechi and Tōyō meet at Kōchi Castle, where they discuss plans to negotiate with the ministers. However, a masked assassin appears and mortally wounds Tōyō, and escapes after defeating Ryōma and Takechi in combat. Having been accused of murdering Tōyō, Ryōma escapes captivity, vowing to return to Tosa to prove his innocence once he captures the assassin.

One year later, Ryōma resides in Kyo, going by the alias Saitō Hajime. He wanders several renowned dojo, inquiring information about the Tennen Rishin, a fighting style which Tōyō's assassin was using. After encountering an individual who calls himself Niibori Matsusuke, Ryōma is introduced to the Bathkeeper of Sai, an information broker who reveals to him that the Tennen Rishin style is practiced by the founders of the Shinsengumi. Believing that the assassin is one of the founding members, Ryōma decides to join their ranks. Ryōma later reunites with Takechi in the Mukurogai district, where he learns that the latter had become a jōshi and allied himself with the elders of Tosa. Takechi expresses disapproval of Ryōma's decision to join the Shinsengumi, causing the latter to denounces their brotherhood and depart.

The next day, Ryōma goes to the Shinsengumi's headquarters in Mibu to enlist. After impressing Second Division Captain Nagakura Shinpachi in a duel, Ryōma personally meets with the Deputy Chief, Hijikata Toshizō, who appoints him as Third Division Captain after executing the previous captain, Yamanami Keisuke, for desertion. Ryōma is later contacted by Nakaoka Shintarō, Tōyō's former retainer who believes Takechi is the real mastermind behind Tōyō's assassination. After surviving an ambush by Tosa loyalists, Ryōma and Nakaoka part way as they agree to cooperate. In one of his first assignments, Ryōma accompanies several Shinsengumi captains to apprehend Okada Izō, Takechi's right-hand man who has gained notoriety for assassinating several Bakufu leaders. Ryōma defeats Izō and allows Kyo's police to detain him, though later learns that he is to be taken to Tosa to face Lord Yamauchi Yōdō, possibly implicating Takechi and the loyalists. Some times later, Ryōma joins the Shinsengumi to raid a loyalist meeting at Ikedaya Inn. Ryōma encounters Niibori, who reveals his true identity as Katsura Kogorō, leader of the Chōshū Loyalist Party. At Katsura's request, Ryōma pretends to fight him and lose, allowing him to escape the Shinsengumi.

Ryōma eventually learns that there is an imposter using his name, who has been making arms deals with the British, with the backing of Navy Admiral Katsu Rintarō. He attempts to interrogate Satsuma Domain Army commander Saigō Kichinosuke, though the latter refuses to divulge any information. Ryōma is summoned by Shinsengumi Chief Kondō Isami, who is also aware of the former's identity. Kondō reveals that he plans to stage an attack that would leave Kyo in ruins, forcing Emperor Meiji to relocate to Edo and make it Japan's new capital; he requests Ryōma to aid his cause, promising to reveal Tōyō's killer to him, but Ryōma refuses. First Division Captain Okita Sōji, who overheard the conversation, later challenges Ryōma to a fight while pretending to be the killer, and ultimately loses. Ryōma then receives a letter from Nakaoka, informing him that Takechi had been executed in Tosa. In a drunken state of depression, Ryōma manages to stop a scuffle between Katsura and Saigō, allowing the two of them to befriend one another and end their ancestral feud.

The next day, Ryōma learns that Sixth Division Captain Inoue Genzaburō had been killed, causing unrest within the Shinsengumi. Okita accuses Ryōma of having carried out the murder, but Kondō intervenes and reveals the truth: Inoue, whose true identity was Serizawa Kamo, was hired by Ryōma's imposter to assassinate Tōyō a year prior; he, alongside his fellow exiled Mito comrades Hirayama Gorō and Hirama Jūsuke, was targeted by the real Okita, Inoue and Nagakura, but Serizawa killed them in self-defense. Kondō and Hijikata agreed to keep this event a secret, and had Serizawa, Hirayama and Hirama take up the identities of Inoue, Okita and Nagakura, while also passing down their fighting technique to other Shinsengumi captains as the Tennen Rishin style. Kondō reveals further that the fake Ryōma had been staying at Teradaya Inn, and the Shinsengumi was planning to raid the area. Ryōma and Okita arrive at Teradaya and confront the imposter; amidst their fight, Ryōma notices a scar on the imposter's back, resembling that of Takechi. The imposter escapes, while the Mimawarigumi arrive, declaring that the Shinsengumi is barred from pursuing this case further as they take over. Ryōma later reports to Kondō and learns that Katsura and Saigō have united their armies to form the Satchō Alliance, as they prepare to wage war with the Bakufu. Ryōma and Okita travel to Edo and storm Edo Castle, where they confront Shogun Tokugawa Yoshinobu. Ryōma hands Yoshinobu a letter from Kondō, setting the terms for the Great Restoration, which would end the Tokugawa's reign and restore power to the Imperial Court, as well as abolish the class system. Yoshinobu agrees to concede, preventing all-out war with the loyalists.

Ryōma and Okita return to Kyo and find it engulfed in flames. After finding a dying Kondō, Ryōma confronts his killer, Izō, and defeats him. In his final breath, Izō confirms that Takechi has been posing as Ryōma as part of his plot to ignite a war between the Emperor and the Bakufu. The next day, Hijikata summons the remaining Shinsengumi captains and exposes Military Advisor Itō Kashitarō for his complicity in Kondō's death. Itō, alongside captains Takeda Kanryūsai and Tōdō Heisuke, announce their defection as they form a new organization, the Goryo Eji, comprising a large number of Shinsengumi troops. Tōdō later reveals to Ryōma and the others that he has been spying on Itō, per Kondō's orders. Upon learning that Takechi and Itō intend to set up a meeting with loyalist representatives, the Shinsengumi attempts to stage a trap. Tōdō, however, is fatally wounded by Takeda, who is killed by Ryōma in retaliation. Meanwhile, Takechi had anticipated their attack and set up a decoy to attend the meeting. As the Shinsengumi raids the meeting, Katsura and Saigō manage to escape while Nakaoka is injured. Ryōma kills the decoy, but is stopped by Itō and Mimawarigumi commander Sasaki Tadasaburō, while Takechi escapes, telling Ryōma to meet him at Tosa.

Ryōma and the Shinsengumi stage an assault on Takechi's stronghold in Tosa, fighting through Mimawarigumi and Goryo Eji forces, as well as Takechi's British allies. Ryōma confronts Takechi alone and defeats him, but cannot bring himself to kill his own sworn brother. Takechi finally realizes that he cannot save Japan through force of arms alone, and reveals Yōdō as the true mastermind behind his plan. Yōdō arrives and shoots both Ryōma and Takechi, boasting his intention to allow the British to use Tosa as their foothold to turn Japan into a British colony. Declaring that Japan is capable of maintaining independence as his allies arrive to corner Yōdō, Ryōma subsequently kills him. Two years later, it is revealed that Takechi has assumed Yōdō's identity and used his position to usher in the Meiji Restoration, restoring imperial rule in Japan. Nakaoka, who managed to recover from his injuries, begins to write a novel about Ryōma under the pen name Sakazaki Shinran. Meanwhile, Ryōma has decided to discard his name and live as Saitō, retiring to a quiet life in the countryside.

In an epilogue, taking place in the present day, a man and his son are seen observing a statue of Ryōma. The man encourages his son to follow him until he can find his own path, comparing themselves to the people of Japan following Ryōma's ideals.[lower-alpha 3]

Like a Dragon: Ishin! sold 35,897 physical copies on PlayStation 4, and 31,439 physical copies on PlayStation 5, resulting in a total of 67,336 physical copies sold within its first 5 days of release in Japan.[33] Both versions remained in the top 30 by their fourth week of release, selling a cumulative total of 85,725 physical copies.[34]