Manga titles have doubled in length over 15 years, and the words "Isekai" and "Reincarnation" appear in them more and more often

Japanese e-book distributor and publisher BookLive analyzed manga titles, sales, and buying habits over the past 15 years. The study turned up several clear shifts.

The average title length for a first volume grew from 9.14 characters in 2011 to 18.45 in 2026. The median over the same period rose from 8 to 16 characters. Titles for male-oriented manga currently average 17.11 characters, while those aimed at women average 19.46.

One reason is that readers want to save time and money. Longer titles usually describe a story better, so buyers can figure out what they're getting before they pay.

The trend got a big push from the popularity of web novels, which often use titles written like a short synopsis. In online stores, such titles also double as a set of search keywords.

Popular title words have changed too. In shonen and seinen, "isekai," "reincarnation," and "strongest" show up especially often, and works with these words have frequently made it onto bestseller lists. Authors also increasingly put the protagonist's abilities and the quirks of the world right in the title.

Shojo and women's manga saw even bigger changes. In 2016, popular words centered on love, marriage, and romance. By 2019, more down-to-earth themes started appearing, such as housewives, toxic workplaces, and life next door. Since 2021, isekai-related words have taken hold at the top: "noble lady," "villainess," "adoration," and "saint."

Most readers don't stick to the big hits, though. The top 100 best-selling manga over the past year brought BookLive only 15.3% of total sales, while everything else accounted for about 85%. Meanwhile, 42.9% of customers didn't buy a single book from the top 100.

The buying pattern itself has changed as well. In 2011, an average transaction included 1.19 books, compared to 2.82 in 2026. The average purchase amount grew from 567 to 1,327 yen (roughly $3.60 to $8.43).

According to BookLive, the growth is partly due to the spread of e-books and sales promotions. Readers increasingly buy several volumes at once and binge completed series in full instead of picking them up one at a time.