using one's kimono sleeve as a pillow
Archaic term referring to the practice of resting one's head on a folded kimono sleeve, often in travel or informal settings. Not used in modern daily life.
During his journey, he took a nap using his sleeve as a pillow.
Compound of 袖 (sode, 'sleeve') and 枕 (makura, 'pillow'). The exact historical origin is uncertain, but it reflects a practical custom in pre-modern Japan.