The phrase "manga boom" refers to a period of time when manga, which are Japanese comic books, became extremely popular or experienced a sudden increase in popularity. Full definition
With one major anime company announcing they're phasing out DVD releases, Krystallina wonders how do we prefer our anime and manga releases.Back during the anime / manga boom of the 2000s, prices were simple: $ 10 got you a manga, and $ 30 got you... (theoasg.com)
Viz had been in that market since they started, and thus were able to capitalize on the Pokemon craze, which is what started the anime / manga boom in the U.S. (Mixx / Tokyopop had the Sailor Moon franchise then, but no book trade distribution. (comics212.net)
80s and 90s nostalgia is in full swing, and even series that made a splash in the 00s manga boom could be given a second chance. (theoasg.com)