1. Issa Memorial MuseumShinano Machi Kobayashi Issa was a Japanese poet and lay Buddhist priest of the Jōdo Shinshū sect known for his haiku poems and journals. He is better known as simply Issa , a pen name meaning Cup-of-tea . He is regarded as one of the four haiku masters in Japan, along with Bashō, Buson and Shiki — the Great Four.Reflecting the popularity and interest in Issa as man and poet, Japanese books on Issa outnumber those on Buson and almost equal in number those on Bashō. From Wikipedia, the free encyclopedia.