in spring, and in early summer Cyclosa octotuberculata (Araneidae) [Japanese name : gomi-gumo] The web is attached to waste products e.g. scraps, excuvia, etc. The spider is imitating its waste products. So you can hardly find the spider. The length is 12-14mm. It is found on four main islands in Japan - namely, Honshu, Shikoku, Kyushu, and Okinawa.

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