Potato salad is a favourite in Japan that is a lighter form compared to western recipe

Video: How to make Japanese style potato salad 
by Runny Runny 999

"Potato salad is a ...favorite in Japanese households, where it's often made lighter... than its Western counterparts." 

Source: JAPANESE HOME COOKING: Potato salad 

Asahi Shimbun

 October 9th, 2012 

http://ajw.asahi.com/article/cool_japan/cooking/AJ201210090052

Recipe: Japanese potato salad here