A TV program broadcast on October 28, 2001, "Tokoro san no Megaten" (theme: Mystery of bland tasting Udon served in Osaka) made a trip to solve the mystery of color change of soup broth served by the Udon noodle shops at each station along the Tokaido Shinkansen railroad.
2001年10月28日放送『所さんの目がテン!』（テーマ：大阪うどんうす味の謎）では東海道新幹線各駅のうどんつゆの色の変化を解き明かす旅が行われた。