small supporting pillars of a torii or temple gate
Architectural term for the secondary pillars that flank and support the main pillars of a torii or temple gate. Not a general-use word.
At a shrine's torii, small supporting pillars are erected on both sides of the main pillars.
Compound of 袖 (sleeve, side) and 柱 (pillar), referring to pillars that are positioned like sleeves beside the main pillars.