娯 means 'pleasure'

These four essays provide the key to happiness. With 暇 one has free time, whether a vacation, a leave of absence, or simply time to kill. Then 娯 provides destinations for having structured fun, including amusement parks, theaters, or venues for karaoke, pachinko, or horse races. With 愉 people relax into a carefree sense of fun and pleasure. And with 悦 one can experience joy and delight in a variety of things, including hospitality, a sense of progress, food, artistic masterpieces, a college acceptance, religious rapture, and sexual ecstasy.

This bundle provides a solid introduction to manga, especially essay 1838, with its definitions of "manga" and related vocabulary, a manga history, a list of manga genres, and explanations of the symbols used in these cartoons. Essay 1238 supplies essential context about the history of amusement in Japan, including a manga magazine. Essay 2113 discusses the sudden rise of the manga and anime subcultures in the 1970s, which led to classic works inspired by Osamu Tezuka, who started the so-called manga revolution. And essay 1630 showcases Shigeru Mizuki's epic manga about World War II, with translations of four panels.