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|Affiliates||Chonmagyo, the Mijingou, Puchi Ogura #10, Enbiraru|
|Location/Residence||Torrent's Waterfall, Jungle|
|First Appearance||Densetsu no Starfy 2|
|Latest Appearance||Densetsu no Starfy 3|
Echigyoya is an old fish who serves under Puchi Ogura #10 and is the leader of the Chonmagyo. In Densetsu no Starfy 3 he uses Mijingou as bodyguards, who follow him as he promised that he would reward them.
Moe told Mantahan to wait a little longer, and told him that he lent treasure to Echigyoya before. Moe then said that if Mantahan(?) lends him treasure, he will return a little more than twice as much. Moe asked Moon if he could borrow her mobile to call Echigyoya, and used it, but got a message saying that the phone number he called isn't currently used. Mantahan talks about treasure in the Jungle and Kabasonchou, the owner of the "sleeping treasure" cave.
Starfy, Starly and Moe find Kabasanchou. After they give him the Bear-san Rucksack, he gives Moe a Title Certificate that proves that he owns the cave. It would have cost 10000000 Pearls, but Mantahan supposedly paid for it.
Starfy, Starly, Moe and Mantahan find Echigyoya in the cave with the Mijingou. Echigyoya promised a reward to the Mijingou if they found treasure.
He attempted to stop Starfy again by having his fifteen Mijingou attack him, but Starfy easily defeated them. Then, Mantahan showed Echigyoya the Title Certificate that proved that Moe is the owner of the cave and argued that he cannot be doing things like entering the cave without Moe's permission and looking for treasure, even though Mantahan thinks he is the real owner of the treasure.
Starly discovers that Kyorozou is also here, with treasure, though he walked off through the boss door without collecting it. Mantahan says that he stole his treasure, but says that it's now Moe's responsibility to repossess it, so he collects it while Starfy fights the boss Enbiraru. It turns out that Echigyoya hired Enbiraru as a bodyguard, who thinks he will get half of the treasure.
- Atsushi Echigyoya is a pseudonym of Atsushi Okamoto in the second version of the Densetsu no Starfy 2 Staff Credits.
- On page 111 in the Densetsu no Starfy 2 Nintendo Official Guidebooks, Echigyoya's sprite appears blue instead of red. This possibly means that Echigyoya used a different color palette prior to the release of the final game. A sprite of Puchi Ogura #10 has his body using a darker shade of blue as well.