There are different species of yellow sac spiders:
"Yellow sac spiders which have been implicted in human poisonings include C. brevicalcaratum in Australia, C. inclusum in the United States and southwestern Canada, C. japonicum in Japan, C. mildei in the Mediterranean and the United States, C. mordax in Australia, the Central and Southwestern Pacific, and some parts of the United States (including Hawaii), and C. punctorium in Europe."
We don't have C. japonicum here.