Iwashi Tatami

is a chūnin from Konohagakure.

Chūnin Exam Arc
Iwashi first appeared when showing Anko Mitarashi a video of the Sand Siblings after passing the second test of the Chūnin Exams, noting in particular that Gaara was untouched.

Sasuke Retrieval Arc
He appeared later with Raidō Namiashi, Shizune, and Genma Shiranui on a mission. Raidō and Genma were badly injured by the Sound Four, and Iwashi wanted to get revenge for his comrades, but was stopped by Shizune.

Mizuki Strikes Back Arc
In the anime, Iwashi, along with Tonbo Tobitake, informed Tsunade about Mizuki and the Legendary Stupid Brothers escaping from prison together.

Land of Vegetables Arc
Later, Iwashi, along with Tonbo and Mozuku, accompanied Shizune and Shikamaru Nara to the Land of Vegetables to take back the country from the Criminal Brothers control.

Trap Master Arc
Iwashi was present when Tsunade ordered him along with other ninja to go investigate a possible attack on Konoha. It was later revealed that the whole incident had been set up by Gennō.

Hunt for Itachi Arc
In the anime, after Sasuke absorbed Orochimaru, Iwashi was briefly shown, along with Anko and Mozuku, shortly before Anko sensed Orochimaru's death.

Trivia

 * His name means "Sardine Mat (rug)", as Iwashi directly translates into "sardine" and tatami is a type setting of cloth.