noun, na-adjective
meticulous and thorough; carefully planned; scrupulous
Emphasizes extreme attention to detail and completeness in planning, preparation, or execution. Often used in formal or business contexts.
彼の綿密周到な計画のおかげで、プロジェクトは成功した。
Thanks to his meticulous and thorough planning, the project succeeded.
綿密周到な準備が必要だ。
Meticulous and thorough preparation is necessary.
A compound of 綿密 (detailed, minute) and 周到 (thorough, careful). The exact historical derivation is uncertain, but it is a typical Sino-Japanese four-character compound used in formal writing.