Ao no Miburo (Blue Miburo)

Ao no Miburo — A Coming-of-Age Sword Drama on the Eve of the Shinsengumi's Formation

Ao no Miburo is a manga by Yasuda Tsuyoshi serialized in Kodansha's Weekly Shonen Magazine from 2021 onwards, with a TV anime first season (12 episodes) broadcast in 2024. Set in late Edo period Kyoto, the story uniquely begins with the Mibu Roshigumi — the precursor organization to the Shinsengumi. The work vividly depicts in shonen manga form how historical figures such as Hijikata Toshizo, Kondo Isami, and Okita Soji grew as swordsmen. A young man enters that world, and through him readers witness the youthful forms of Hijikata Toshizo, Kondo Isami, Okita Soji, Yamanami Keisuke, and Nagakura Shinpachi.

### The Mibu Roshigumi as the Narrative's Foundation

This work focuses not on the "Shinsengumi famed throughout the realm" depicted in most creative works, but on its precursor stage: "a gathering of nameless swordsmen." In Bunkyō 2nd year (1862), the Mibu Roshigumi — commissioned by the Tokugawa shogunate to guard Kyoto Protector Matsudaira Katamori — was an organization composed of low-ranking ronin and sons of farmers. A young man enters that world, and through him readers witness the youthful appearances of Hijikata Toshizo, Kondo Isami, Okita Soji, Yamanami Keisuke, and Nagakura Shinpachi.

The portrayal of Hijikata Toshizo is one of the work's greatest highlights. A native of Tama's farming families, Hijikata trained in Tennen Rishin-ryu and is depicted as a young man filled with anger and contradiction before becoming the commanding officer known as the "Demon Vice-Commander." The work portrays both the ferocity of the swordcraft he honed and the coldness required to maintain organizational discipline in a form that modern young readers can empathize with, embodying the Shinsengumi demand documented in GSC with nine impressions for "hijikata toshizo."

### Tennen Rishin-ryu and Shinsengumi Swordsmanship

Many of the members from the Mibu Roshigumi who later formed the Shinsengumi were practitioners of "Tennen Rishin-ryu." Kondo Isami was the headmaster of Tennen Rishin-ryu, while Hijikata Toshizo, Okita Soji, and Yamanami Keisuke were his distinguished disciples. The work naturally reveals in its action sequences the characteristics of this school — training with heavy wooden swords, practical swordcraft emphasizing striking power over form, and an open door to farmers and commoners.

Tennen Rishin-ryu placed greater emphasis on "sparring matches" than on "kata," and this philosophy directly connects to the Shinsengumi's practical and results-oriented combat spirit. The training scenes and match depictions in this work embody this pragmatic sword philosophy, and they form a source of affinity for the Shinsengumi felt by modern sword enthusiasts and martial artists.

### Connection with Japanese Swords — Hijikata Toshizo's Izumi-no-Kami Kanesada

The "Izumi-no-Kami Kanesada (いずみのかみかねさだ)," the sword used by Hijikata Toshizo as his beloved blade, is one of the most famous Japanese swords among works taking the Shinsengumi as their subject. This sword is said to have been forged by the eleventh-generation smith Izumi-no-Kami Kanesada of the Aizu domain during the Keio era (1860s), and is currently transmitted as a relic of Hijikata Toshizo together with other materials in the vicinity of the Hekketsu Monument in Hakodate.

An uchigatana with a blade length of approximately 2 shaku 4 sun (approximately 73 cm), the steel has a fine ko-itame grain, and the hamon displays gunome mixed with small midare, with bright nie-based temper. The tang (nakago) bears the two-character signature "Kanesada," and has subsequently received treatment akin to an Important Cultural Property as the "beloved sword of Hijikata Toshizo," becoming a symbol of Japanese sword culture. Since Ao no Miburo depicts the young Hijikata of the Mibu Roshigumi era, anticipation has grown among readers for the moment at which this beloved sword appears.

Also, the "Kikuichimonji Norimune (菊一文字則宗)" — traditionally said to be the beloved sword of Okita Soji, though historical accounts vary — serves as an important gateway for readers of this work, which depicts Okita as a major character, into the world of Japanese swords.

### The Exquisite Balance Between Historical Fact and Shonen Entertainment

A major strength of this work is the simultaneous achievement of historical accuracy in character depiction and entertainment value as shonen manga. It naturally incorporates historical context — the political tensions of the late Edo period (sonnō jōi versus sabaku) — the social conditions of Kyoto, and questions of status among the ronin into the growth narrative of its protagonist. The thrill that arises from readers knowing that historical events (the Ikedaya Incident, the Kinmon Incident, and others) await ahead in the story creates a distinctive intersection of fiction and historical fact.

In comparison with celebrated works featuring the Shinsengumi such as "Hakuoki" (otome game, 2008) and "Mibu Gishi Den" (film, 2002), Ao no Miburo is a rare work depicting the Shinsengumi from the perspective of male-oriented shonen manga, and through its serialization in Magazine — which reaches a vast readership — it fulfills a cultural role in cultivating the next generation of sword and Shinsengumi enthusiasts.

### Anime Adaptation and Future Prospects

The TV anime first season (12 episodes) broadcast in 2024 was aired on MBS/TBS networks, with OxT — who provided opening and ending themes for "Re:CREATORS" and "Overlord" — handling the theme songs. It received praise for its faithful reproduction of the original manga's artistic style and its careful depiction of the atmosphere of late Edo period Kyoto through its art design. The serialization continues, and further attention is expected as the story progresses toward the Ikedaya Incident and the establishment of the Shinsengumi.

### A Perspective for Sword Enthusiasts and Shinsengumi Fans

Among works taking the Shinsengumi as their subject, Ao no Miburo stands out by directly engaging with "the process of sword training." The accumulated practice before Hijikata Toshizo becomes the "Demon Vice-Commander," Okita Soji's emergence as a genius swordsman, and Kondo Isami's qualities as an instructor are depicted carefully through the sword. For readers interested in the beauty of swords and the depth of swordcraft, the formation process of the Mibu Roshigumi — a gathering of swordsmen — is an ideal gateway, and this work presents that gateway in a compelling manner.