Since there are few historical materials written or recorded by these four people including Juko, much of the information now available is based on legend and it is hard to really know the nature of their styles of tea ceremony.
ただし、珠光を含めこれら４名は、本人による文献史料がほとんど残っておらず、多くが伝承であり、その茶の本質を知るのは困難である。