Nishikado (西門,Nishikado) was the Grand Master of the Nishikado style of tea ceremony. He was the father of three sons, including Shoichiro and Sojiro. He regularly cheated on his wife, with whom he had a strained relationship. After Shoichiro left home, Sojiro was the one to succeed their father as head of their tea ceremony school.
Nishikado belonged to a long line of Grand Masters whom practiced the Nishikado style of tea ceremony. He married his wife and had three sons, including Shoichiro and Sojiro. Nishikado and his wife argued regularly. As a child, Sojiro smashed the family's ship in a bottle while trying to extricate the ship. His father gave him a thorough scolding. Nishikado also scolded Sojiro when he and Sara Hinata played in a storeroom, which housed plates dubbed "national treasures." Gradually, the Nishikado family became more dysfunctional. Nishikado began to keep a mistress, which his wife tolerated. Shoichiro later left the home, placing the burden of being their father's heir on Sojiro. When he was in college, Sojiro succeeded his father as the head of their tea ceremony school.
In F4 Thailand (2022), he is portrayed briefly by an unnamed actor. Kavin's (Sojiro) father is a high-ranking government official and the family is said to be one of Thailand's oldest. He is only seen in episode nine at Pakorn's funeral with his wife and son. Unlike in the manga or previous live-action adaptations, there is no mention of him being unfaithful to wife.