It is also called 'yui,' and implies fundamental mutual aid regardless of one's occupation or position, and is supposed to be voluntary, so it can be considered a social obligation in relationship with one's neighbors (or jubu relationship).
-「結い」ともいい、職業や立場など関係ない根源的な相互扶助であり、無償である事が前提である普請で近所付き合い（十分の付き合い）ともいえる。