There is a theory that because SEN no Rikyu had conflicts with Hideyoshi TOYOTOMI and was forced a Seppuku (suicide by disembowelment), and Jokei who had the least connection with Rikyu became the head of the family.
千利休が豊臣秀吉と対立して切腹に追い込まれたため、利休に一番関わりの薄かった常慶が当主となったという説もある。