Surgery

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This image is from the first page of Chapter 9 (“Angel”) of artist Waita Uziga’s guro manga Shin Gendai Ryoukiden (also titled 真・現代猟奇伝 or True Modern Stories of the Bizarre). There is a related panel on the last page. Waita Uziga’s web page is here.
Image provenance by Bacchus at Erosblog.

Seppuku

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This is an excerpt from a slightly longer animation said to have been created by Juan Gotoh, although it seems no longer to be found on his website. In the longer version of this animation, our suicide girl can first be seen kneeling and making a short speech before her assistant draws the katana. The longer clip then concludes with the dead girl’s wide-eyed still-talking head landing and bouncing. According to a comment on this Japanese-language website, the animation was released as part of a 2005 collection of computer graphics (CG) by Gotoh, which collection remains available for purchase.
Image provenance by Bacchus at Erosblog.