This image shows a link to Japanese PORN on the Brunel University London website.
The institution has been left embarrassed by the blunder which was spotted by a shocked researcher.
The 'Japan UK 150' website listed is an '18+' website that contains explicit images and videos.
Brunel's website contains a 'Japanese Resources' page for students interested in taking a language course and learning more about the country's culture.
This section contains links to other webpages, including language guides, anime and manga culture.
But one researcher had a nasty surprise when they found that the link 'Japan UK 150' - under the subtitle 'Japanese Culture' - opened a new tab full of hardcore pornography.
A Brunel University London spokesperson said: “We are grateful that this inappropriate link was pointed out to us and we deleted it immediately.
“We expend considerable time and effort policing our 44,000 web pages which contain in excess of 100,000 links.
"Unfortunately, occasionally, what were previously innocent and useful links can change hands which is what we believe happened here.”