is a Japanese voice actress affiliated with Tomorrow Jam. Starting off as a stage performer, she began voice acting in numerous video games and anime series, with her first main role being in the game Toys Drive.
Koichi was born in Nagano Prefecture and raised in Tokyo. She entered a high school with a theater department, where she gained experience performing on stage. Koichi was cast as Minami Iwasaki in a Lucky Star musical titled Lucky Star â On Stage. She became interested in voice acting after watching the Lucky Star anime in order to study her character in the musical. In 2014, Koichi joined the voice acting agency Atomic Monkey, and voiced her first main character in the video game Toys Drive. In April 2021, Koichi left Atomic Monkey and moved to Stay Luck. In February 2023, she started hosting a radio program on Nippon Cultural Broadcasting's A&G block. In December 2024, Koichi moved to the talent agency Tomorrow Jam.