Oban was classified into 'Tenjo no oban' and 'Shosho no oba' and this was gathered by the several designated tenjobito (high-ranking courtier allowed into the Imperial Palace) when necessary, but these were bento (packed meals)/light snacks that were considered separate from the official ceremony.
椀飯には「殿上の椀飯」と「所々の椀飯」があり、必要な場合にその都度所管の殿上人数名に分担して調達させていたが、あくまでも公式な行事部分とは一線を画した弁当・軽食の類であった。