A mandarin orange tree was transplanted not only for its relation with Kawakatsu; with the name of "Tokijikuno Kakuno-konomi," an ever-shining fruit, it was treated as a symbol of long life and auspiciousness since old times due to its always having dense leaves regardless of the difference in temperature.
橘を植えるのは、河勝宅地の縁だけではなくて、橘が古くからトキジクノカクノコノミといわれ、その葉が寒暖の別なく常に生い茂り栄えるから、長寿瑞祥の樹として珍重されたからでもあるという。