2847500 jmdict D [id=2133580]
５つの小；五つの小
いつつのこ
[1][exp,n]
  [note="in ref. to the character 小 in the five words 少人数, 小一時間, 小声, 小皿, 小まめ"]
  five small things to keep in mind when holding or attending a party during the COVID-19 pandemic (to gather in small numbers, to break it up after about an hour, to talk quietly, to use small dishes for sharing food, to be careful to wear a mask, to ventilate the space, and to wash one's hands); 
  [lit] the five smalls