While still attending high school in Tokyo, Katsu began training professional wrestling at the dojo of the JWP Joshi Puroresu promotion.

[1] On January 20, 2011, she passed a traditional audition held in front of her trainers and JWP management and officially graduated to the main roster of the promotion, becoming its first ever member still in high school.

[5] She made her "official" debut in Korakuen Hall on April 3, 2011, losing to Sendai Girls' Pro Wrestling representative Dash Chisako.

[12] On August 14, Katsu entered the annual Natsu Onna Kettei Tournament, but was eliminated in her first round match by Ice Ribbon representative Hikari Minami.

[21] As a result of her tournament win, Katsu received a shot at the JWP Junior and Princess of Pro-Wrestling Championships on January 9, 2012, but was defeated by the defending champion, Osaka Joshi Pro Wrestling representative Sawako Shimono.

[22] On February 3, Katsu entered the 2012 Tag League the Best tournament alongside Moon Mizuki, with the two being defeated by Command Bolshoi and Rabbit Miu in their first match.

[25] On March 3, Katsu made her debut for Ice Ribbon, taking part in the promotion's Teens project, spearheaded by Hikari Minami and Riho.

[27] On March 27, Katsu also made her debut for World Woman Pro-Wrestling Diana, wrestling Sareee to a fifteen-minute time limit draw.

[30][33] Katsu and Nakajima also teamed together in the Reina X World promotion, losing to La Malcriada and Zeuxis in a main event on June 24 and defeating Micro and Puchi Tomato on July 7.

[37][38] Four days later, veteran Ran Yu-Yu made her final JWP appearance before her retirement and while doing so, handed Katsu two of her signature moves, a leg lariat and the Blockbuster, to use in the future.

[44] On January 27, Katsu was again pinned by Miu in a four-way, which also included Nana Kawasa and Rydeen Hagane, and, as a result, earned a spot in the 2013 Tag League the Best tournament.

[47][48] After losing to Dash Chisako and Sendai Sachiko in their opening match on February 17,[49][50][51] Katsu and Miu finished their Tag League the Best tournament on March 31 with a win over Kazuki and Sachie Abe, failing to qualify for the finals.

[52] On April 14, Katsu made her first successful defense of the JWP Junior and Princess of Pro-Wrestling Championships against Ice Ribbon representative Risa Sera.

[59][60] On October 17, Katsu took part in a big generational eight-on-eight elimination match promoted by Sendai Girls' Pro Wrestling, where she, Hikaru Shida, Kagetsu, Sareee, Syuri, Takumi Iroha, Yoshiko and Yuhi defeated Aja Kong, Command Bolshoi, Dump Matsumoto, Dynamite Kansai, Kyoko Inoue, Manami Toyota, Meiko Satomura and Takako Inoue.

[86] The following day, Team JWP defeated United Nations (Juan Francisco de Coronado, Prakash Sabar and The Proletariat Boar of Moldova) to advance to the semifinals of the tournament.