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zuihitsu

n. A Japanese literature genre consisting of loosely connected essays and fragmented ideas

Wikipedia
Zuihitsu

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 zuihitsu is ultimately Chinese, however, being a transcription of suibi rendered into Japanese as 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.