Themes and genres This thematic orientation of manga is readily inferred from the formal
values or slogans that manga magazines assign themselves: for example, "friendship, perseverance, and victory" for
Weekly Shōnen Jump, and "courage, friendship and fighting spirit" for
CoroCoro Comic. The editorial focus of manga is primarily on
action,
adventure, and the fighting of monsters or other forces of evil. Action stories are so dominant in manga that some manga and non-manga works are occasionally designated as not because of their ostensible target group, but because of their content focus on action and adventure. Though action narratives dominate the category, there is deep editorial diversity and a significant number of genres and subgenres within manga, especially when compared to other comic cultures outside of Japan. This includes but is not limited to
comedy,
crime,
romance,
slice of life, and stories about activities such as
sports and the lives of different types of working professionals. In recent years, isekai—a subgenre involving protagonists transported or reincarnated into alternate worlds—has become increasingly prominent within shōnen manga and related media. The action genre is itself is expressed through a variety of subgenres, from
historical and contemporary drama to
science fiction and
fantasy. war fiction has been alternately jingoistic or critical of militarism and violence, with
Barefoot Gen by
Keiji Nakazawa as a notable example of the latter.
Samurai appeared frequently as idealized role models for boy readers in early , analogous to representations of
cowboys in western comics; samurai stories shifted to comedy and sportsmanship in the post-war period, before returning to themes of idealized themes of good versus evil. Though manga typically attempts to convey a message of peace, the category has been criticized by individuals such as director
Hayao Miyazaki for promoting overly simple good/evil dichotomies.
Narrative conventions A protagonist is often characterized by contradictory qualities: short-tempered and cool, mischievous and rebellious, serious and cynical, clumsy and infallible, or who appears as a good-for-nothing but possesses hidden abilities. In some cases, the contradiction takes on a literal form in the form of , where the hero is able to switch between two personas with different appearances and personalities; examples of this device include
Yu-Gi-Oh by
Kazuki Takahashi and
Samurai Deeper Kyo by
Akimine Kamijyo. Transformation abilities are often linked with bonds to a spirit, monster or robot. A major narrative device in manga is rivalry between the protagonist and his opponent, with a fight or a quest often appearing as a central element;
Dragon Ball is among the most popular and commercially successful examples of this archetypal story. Typically, a protagonist is an outsider, or in some way disadvantaged compared to others, but who through training, perseverance, and willpower eventually succeeds against all odds. Plots typically follow the basic structure of the
hero's journey, with much of the story focused on the protagonist's training and transformation into a hero, and on characters who earn their status as heroes through effort and tenacity rather than by virtue of birth or assignment. For long-running series, the hero's journey repeats itself; as a new
story arc begins, the enemy becomes more powerful and the danger to be overcome becomes greater. In addition to these external conflicts, a protagonist often also faces internal conflicts, typically focused around maturity and growing older. In contrast to manga, which often focuses on the thoughts and
interior monologue of the hero, typically advances plot through dialogue and action.
Happy endings are common in manga, but are not obligatory.
Visual style er dressed as
Naruto Uzumaki from
Naruto, displaying the characteristic "spiky" hairstyle Comics theorist
Neil Cohn regards the art style of as generally "edgier" than that of manga, and notes how most regular manga readers are able to easily distinguish between and based on visual appearance alone. Visually, a protagonist often possesses what manga critic
Jason Thompson describes as "insanely spiky hair" that distinguishes the protagonist's
silhouette from that of other characters. The eyes of characters in the post-war period are
significantly smaller than those of characters in manga; large eyes are used in manga to better convey the emotions of the characters, an aspect which has historically been given less focus in manga. A common visual device in action scenes is to depict the contours of figures with rough, coarse
motion lines to give the appearance of movement. In interviews, manga artists have discussed differing creative processes and visual techniques, highlighting variation in how shōnen manga is produced.
Role of women Historically, the protagonists of manga were almost exclusively men and boys; women and girls appeared primarily in supporting roles as sisters, mothers, or girlfriends, if at all. This was especially true of sexualized stories that developed out of manga beginning in the 1970s, with
The Abashiri Family by Go Nagai as one of the earliest representative works of this development, as well as an early example of a manga with a female protagonist. Studies of gendered language in shōnen manga have found that female characters are often written with more stereotypically feminine speech patterns, reflecting broader conventions in manga characterization. Women and girls have generally played a more active role in manga since the 1980s, fighting alongside male characters and not merely as passive support.
Dr. Slump by
Akira Toriyama was an early representative work of this development, with its mischievous child protagonist
Arale Norimaki being among the first manga to depict this type of archetypal character as a girl rather than a boy. The 1980s also saw female manga artists rise to greater prominence: notably horror manga artist
Kei Kusunoki, and
Rumiko Takahashi with her romantic comedies
Urusei Yatsura and
Ranma ½. Especially in series that are aimed at an older audience, female characters are often presented in a manner that is attractive to the male target audience as (literally "beautiful young girls"). They exist as objects of romantic or sexual desire not merely for the male characters, but also for the ostensibly heterosexual male reader as a form of
fan service. While these objectifying tropes have persisted in manga, women have also developed more active roles in these fan service-oriented stories. A common romantic comedy trope in manga since the 1980s has been to pair a weak male protagonist with a strong female love interest who is not only the target of his romantic and sexual desire, but also his good friend and confidante. In the
harem genre, which originated from manga, a male protagonist is surrounded by several female characters who desire him, and who are often more confident and assertive than he is; examples include
Negima! Magister Negi Magi by
Ken Akamatsu and
Hanaukyo Maid Team by
Morishige. In other cases, the male protagonist is unsuccessful in his attempts to woo the female character, or the story is focused around the originally naïve and infantile male protagonist maturing and learning how to develop healthy relationships with women. For certain series, a female readership who read in or interpret subtextual
homoerotic relationships between canonically heterosexual male characters constitute a significant proportion of the series' audience; this is especially true of series featuring male characters who are (literally "beautiful boys"), or who are perceived as such by readers. This reading of manga is expressed in the form of
fan works such as (self-published amateur manga) and the
boys' love (BL) genre of manga and anime, which includes both original and
derivative works. Manga scholar
Yukari Fujimoto notes in her analysis of the female readership of the titles
One Piece,
Naruto, and
The Prince of Tennis that homoerotic interpretations of manga tend to be most common among titles that do not include prominent female characters that a female readership is able to identify with. ==Magazines==