Nagahama is probably best known for her time in Pro Wrestling Wave. She made her professional wrestling debut at WAVE Virgin Code on October 29, 2014, where she fell short to Mio Shirai in singles competition.[11] The only championship she has held in the promotion was the Wave Tag Team Championship which she succeeded in winning at Pro Wrestling Wave's 10th Anniversary event from August 12, 2017, where she teamed up with her "Big Rice Field" tag team partner Kaho Kobayashi to defeat Gokigen BBA (Cherry and Kaori Yoneyama) for the titles.[12]
Iida competed in various of the promotion's signature events such as the Catch the Wave, in which she made her first appearance at the 2015 edition of the tournament in which she competed in the "Young Block Oh! Oh!" division, falling short to Maya Yukihi in the first rounds.[13] One year later she appeared for the first time in the big tournament, placing herself in the "Italian Red" block in which she scored a total of three points after going against Sareee, Yumi Ohka and Mayumi Ozaki.[14] She also competed in the Young Block Oh! Oh!, topping the first block with a total of six points after outmatching Akane Fujita, Sumire Natsu and Mari An, but eventually falling short to Yuka in the finals.[15] At the 2017 edition, she placed herself in the A block where she scored a total of seven points after competing against Misaki Ohata, Rina Yamashita and Moeka Haruhi.[16] At the 2018 edition she fought in the "Violence" block where she scored a total of five points after going against Ayako Hamada, Arisa Nakajima, Misaki Ohata, Mio Momono and Hikaru Shida.[17] At the 2019 edition she competed under the shortened name of Hiro'e in the Young block which she topped with a total of six points after outmatching Haruka Umesaki, Ibuki Hoshi and Maria.[18]
As for the Dual Shock Wave, Nagahama made her first appearance at the 2016 edition of the tournament where she teamed up with Moeka Haruhi as "Happy!" and fell short to Chihiro Hashimoto and Ryo Mizunami in the first rounds.[19] At the 2017 edition, Nagahama teamed up with Kaho Kobayashi as "Big Rice Field" and fell short to New-Tra (Rin Kadokura and Takumi Iroha) in the first rounds.[20]
Nagahama announced her retirement from in-ring competition in December 2019 due to health issues.[21] She wrestled her last match at an event promoted specially for her farewell, the WAVE HIRO'e Retirement Last Longbeach on September 18, 2020, where she teamed up with Nagisa Nozaki to defeat Kaori Yoneyama and Miyuki Takase.[22]