It's well documented that the Japanese have an odd fetish for tentacles. There is evidence going back to the Edo period, of artwork depicting sexual activity between women and tentacled sea creatures, usually an octopus, but squids get a look in too. Early illustrations include those for the 1814 novel, The Dream of the Fisherman's Wife, by the artist Hokusai Katsushika. But where this bizarre fetish for tentacles first started is anyone's guess. But it's there, and even in the mainstream.
This is a commercial shown on Japanese TV in the 1980s for an anti-fugal ointment for athletes foot, that eases itching. The product for the pharmaceutical company Fujisawa (フジサワ), was called (New) Piroesu (新 ピロエース). And in there wisdom the advertising creatives in attempting to sell the product to the Japanese consumer, thought that replacing a fungus riddled foot with a bunch of clawing tentacles was a good idea.You can see as the poor old down-trodden Japanese housewife is on her knees trying to appease the beast, with the ointment. The creature pulls and grabs at her, mauling the poor woman, as it tries to slip a tentacle under her skirts. It must have had Tentacle Erotica fans reaching for a tissue when it was shown on TV in the 80s.