Tongue-zapping chopsticks lead Japan scientists to Ig Nobel Prize

According to The Asahi Shimbun, electrified chopsticks that change the taste of food extended the winning streak of Japanese researchers for a satiric Ig Nobel Prize to 17 straight years.
Hiromi Nakamura, a project associate professor at the University of Tokyo, and Homei Miyashita, a professor at Meiji University, won the Ig Nobel Prize in Nutrition for their research on augmented gustation using electricity.
In 2011, when Nakamura was a graduate student studying under Miyashita’s supervision, she conducted experiments to determine how electrification changes the taste of food.
In a trial run, Nakamura put a piece of agar on her tongue and charged it with a small amount of electricity. The taste changed instantly when she turned the switch on and off.

https://www.asahi.com/ajw/articles/15006273