Teuchi

is the owner of Ramen Ichiraku.

Personality
He and his daughter, Ayame seem to be some of the few Konoha citizens not to see Naruto Uzumaki in a negative way and consider him their favourite regular customer in their restaurant.

Search for Tsunade Arc
He witnesses Jiraiya and Naruto head off to Shukuba Town, and is later asked where they went by Sasuke.

Ninja Chef Arc
In the anime, Ayame was kidnapped by Hakkaku, who wanted Teuchi's recipe. The recipe was just to remove the bitter taste from the soup.

Hidan and Kakuzu Arc
After Naruto managed to cut the waterfall in his wind natured chakra training, he was treated to some ramen at Ichiraku. However Teuchi kept rejecting the ramen made by his apprentices Matsu and Nishi before Naruto could eat it, and was quickly getting angry with them, claiming that they kept making these stupid mistakes.

Confining the Jinchūriki Arc
Soon after Tsunade regained consciousness, Sakura burst into Ichiraku to inform Naruto and Teuchi about what happened. Upon hearing the good news, Teuchi offered a bowl of ramen to both Naruto and Sakura, on the house, which Naruto accepted, but Sakura declined. Just as Naruto was about to eat he was reverse-summoned to Mount Myōboku, much to Teuchi's confusion. When Naruto reappeared in Ramen Ichiraku, Teuchi asked where his best customer disappeared to. When Naruto was asked by the other ninja customers for his autograph, Teuchi thought proudly at how Naruto was being called the "Miracle boy" and at the irony at how not so long ago he was thought of as the opposite. Teuchi then asked the other customers to allow Naruto to finish his meal before he signed anything.

Naruto Shippūden 3: Inheritors of the Will of Fire
He is seen when Naruto is at Ramen Ichiraku after he escaped from the hospital.

Naruto Shippūden 4: The Lost Tower
Teuchi is seen in a flashback, on Ramen Ichiraku grand opening, twenty years in the past. The first day seemed to be a success, as he had a huge line of customers impatiently waiting for his half price ramen.

Trivia

 * Teuchi first made his appearance in the official series in a short omake, published in the first databook. However, he had appeared before in the pilot of Naruto, making him one of the earliest appearing characters from the series, together with Naruto Uzumaki himself and an early version of Hiruzen Sarutobi. His first appearance in the actual manga was in chapter 144.
 * Teuchi's favourite word is.
 * Teuchi's name can mean . However, the same word can also mean "killing someone with one's bare hands."