Zuihitsu (随筆) is a genre of Japanese literature consisting of loosely connected personal essays and fragmented ideas that typically respond to the author's surroundings. The name is derived from two Kanji meaning "at will" and "pen." The provenance of the term is ultimately Chinese, zuihitsu being the Sino-Japanese reading (on'yomi) of 随筆 (Mandarin: suíbǐ), the native reading (kun'yomi) of which is fude ni shitagau (“follow the brush”). Thus works of the genre should be considered not as traditionally planned literary pieces but rather as casual or randomly recorded thoughts by the authors. Source: Wikipedia (en)