KARIN?

KARIN is the name of a tree bearing yellow fruit.
The trees are popular in Nagano prefecture, where I was born.
I used to see the trees in the gardens on my way to school.
As the fruit looked delicious, I tried to bite it, but it was very bitter.
Properties of the fruit are good to our throat, so it is often used in candies.
In Japanese, there is another word with the same pronunciation as KARIN. It means do not borrow money ("KANE WA KARINAI"), which is a good policy for me to run my firm.
Therefore, people used to plant the tree in their south garden to remind them of the saying.