Ground Spider is a visually entertaining and spectacular piece of Noh repertoire similar to the Kabuki version. Familiarly called Raiko, Yorimitsu Minamoto (918-1021) is based on a historic figure. He was the chief of the Seiwa Genji Clan who served for the aristocratic Fujiwara Clans as guardsman, the forerunner of Samurais. Raiko, together with his four Great Entourage Warriors (Watanabe no Tsuna, Sakata no Kintoki, Usui no Sadamitsu, Urabe no Suetake) vanquished two scary demons, l) Ground Spider at Mt. Katsuraki in Yamato, near Nara and 2) Shuten Doji, Drunkard Lad, at Mt. Oe, Tanba Country, north of Kyoto, both of which were featured in Noh plays, fifth category. The Shuten-Doji Devil lived during the days of Rasho-Mon, committing all evil crimes in Kyoto, retreating and hiding underground near Mt. Oe, always inebriated, thus named drunkard.
Ground spider, to me, means fearsome tarantula, a tea cup size spider, which I have seen while living in the U.S. They live in the deserts of Arizona, Texas and other southern states. I had wanted to buy a stuffed brown specimen but never did. Those tarantulas in the U.S. don’t use a web to ensnare prey, and are harmless to humans. By Googling I discovered the 2017 Nobel Laureate Bob Dylan wrote his first novel "Tarantula" (unofficially available in 1966). I read it for free after downloading. I was disappointed, however, there was no mention of the Spider Tarantula. He likened himself to a Tarantula setting out on his desert trip to wander the badlands of New York. It’s just interesting he wrote his one and only novel 50 years ago, reputedly hard to interpret.