Yu-ker (Yu-keru) is a health tonic containing various herbs and caffeine. It is Yukio Okumura's supplement of choice to cope with his stressful life.
- Yu-ker is a parody of the real life tonic Yunker.
- ↑ Salaryman Exorcist: The Sorrows of Yukio Okumura:Chapter 1, page 2
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.