After only making few appearances per year for Pro Wrestling Wave since 2007, Ohata began working for the promotion more regularly in late 2009.
On December 23, 2009, Ohata teamed with Moeka Haruhi to defeat Io and Mio, the Shirai sisters, for the TLW World Young Women's Tag Team Championship.
They would hold the title for six months, before losing it to Bambi and Basara on July 4, 2010.
Having worked her entire career as a cute babyface, January 2011 saw Ohata undergo a character overhaul, when she turned heel and came together with Bambi, Hiren and Yumi Ohka to form the Black Wave stable.
On February 14, the group was renamed Black Dahlia, after the 1947 murder case, with Ohata positioned as the de facto leader.
In July, Ohata made it to the finals of the Catch the Wave tournament, before losing to Kana.
During the next few months, Black Dahlia was joined by Ayako Hamada, Cherry, and Hanako Nakamori, with Apple Miyuki, A★YU★MI, Kyoko Kimura, Moeka Haruhi, and Nagisa Nozaki making one-time appearances as members of the stable.
On September 4, Ohata teamed with Mio Shirai in the Dual Shock Wave 2011 tournament, which was used to determine the first ever Wave Tag Team Champions, but the team, billed as "Plus Minus 0", was eliminated in their first round match by Gami and Tomoka Nakagawa.
After the conclusion of the tournament, Ohata and Shirai received the first shot at the new champions, Ayumi Kurihara and Kana, but were defeated in their title match on December 11.
On April 30, 2012, Ohata and Black Dahlia stablemate Hanako Nakamori were put in a match to determine the new Wave Tag Team Champions, there they were, however, defeated by the team of Gami and Tomoka Nakagawa.
On May 4, Ohata entered the 2012 Catch the Wave tournament, where she wrestled in a round-robin block made up of members of Black Dahlia.
After wins over Hanako Nakamori and Cherry and a loss against Tsukasa Fujimoto, Ohata was defeated by Yumi Ohka on June 17 and, as a result, failed to advance from her block.
However, on July 1, Ohata defeated eleven other eliminated competitors in a battle royal to earn her way back into the semifinals of the tournament.
On July 16, Ohata was eliminated from the tournament in the semifinals by Ryo Mizunami.

On July 27, Black Dahlia and rival group White Tails wrestled to a draw in a five-on-five gauntlet match, from which Ohata was eliminated after wrestling Mio Shirai to a ten-minute time limit draw.
Afterwards, Ohata blamed her stablemates in the match, specifically Yumi Ohka, for Black Dahlia not winning the match, noting that they were all in their thirties.
She then recruited the 24-year-old Mio Shirai to the stable; Shirai, however, announced that she would also remain a member of White Tails.
The two groups then agreed that the stable which would manage to draw fewer people to their self-produced Wave event, which would take place August 7 and 8, would disband.
The Black Dahlia event was headlined by an eight-woman tag team match between the stable's two generations.
In the match, Ohata teamed with Apple Miyuki, Hanako Nakamori and Mio Shirai against Ohka, Ayako Hamada, Bambi and Cherry, pinning Ohka for the win after hitting her with the stable's signature whip.
White Tails ended up winning the battle for attendance 201-191, forcing Black Dahlia to disband.

Ohata and Yumi Ohka faced off on August 26 at Wave's fifth anniversary event in a singles match, which was won by Ohata.
Following the win, Ohata announced that she had signed with the Zabun production company, effectively making Pro Wrestling Wave her new home promotion and officially ending her freelancing days.
On September 25, Ohata entered the 2012 Dual Shock Wave tournament with her handpicked partner Tsukasa Fujimoto, with the two wrestling Ayako Hamada and Kana to a draw in their opening round-robin match.
After wins over Apple Miyuki and Kyusei Ninja Ranmaru and Wave Tag Team Champions Gami and Tomoka Nakagawa, Ohata and Fujimoto finished their round-robin block with five points, winning their block and advancing to the finals of the tournament.
After only making few appearances per year for Pro Wrestling Wave since 2007, Ohata began working for the promotion more regularly in late 2009. On December 23, 2009, Ohata teamed with Moeka Haruhi to defeat Io and Mio, the Shirai sisters, for the TLW World Young Women's Tag Team Championship. They would hold the title for six months, before losing it to Bambi and Basara on July 4, 2010. Having worked her entire career as a cute babyface, January 2011 saw Ohata undergo a character overhaul, when she turned heel and came together with Bambi, Hiren and Yumi Ohka to form the Black Wave stable. On February 14, the group was renamed Black Dahlia, after the 1947 murder case, with Ohata positioned as the de facto leader. In July, Ohata made it to the finals of the Catch the Wave tournament, before losing to Kana. During the next few months, Black Dahlia was joined by Ayako Hamada, Cherry, and Hanako Nakamori, with Apple Miyuki, A★YU★MI, Kyoko Kimura, Moeka Haruhi, and Nagisa Nozaki making one-time appearances as members of the stable. On September 4, Ohata teamed with Mio Shirai in the Dual Shock Wave 2011 tournament, which was used to determine the first ever Wave Tag Team Champions, but the team, billed as "Plus Minus 0", was eliminated in their first round match by Gami and Tomoka Nakagawa. After the conclusion of the tournament, Ohata and Shirai received the first shot at the new champions, Ayumi Kurihara and Kana, but were defeated in their title match on December 11. On April 30, 2012, Ohata and Black Dahlia stablemate Hanako Nakamori were put in a match to determine the new Wave Tag Team Champions, there they were, however, defeated by the team of Gami and Tomoka Nakagawa. On May 4, Ohata entered the 2012 Catch the Wave tournament, where she wrestled in a round-robin block made up of members of Black Dahlia. After wins over Hanako Nakamori and Cherry and a loss against Tsukasa Fujimoto, Ohata was defeated by Yumi Ohka on June 17 and, as a result, failed to advance from her block. However, on July 1, Ohata defeated eleven other eliminated competitors in a battle royal to earn her way back into the semifinals of the tournament. On July 16, Ohata was eliminated from the tournament in the semifinals by Ryo Mizunami.
On July 27, Black Dahlia and rival group White Tails wrestled to a draw in a five-on-five gauntlet match, from which Ohata was eliminated after wrestling Mio Shirai to a ten-minute time limit draw. Afterwards, Ohata blamed her stablemates in the match, specifically Yumi Ohka, for Black Dahlia not winning the match, noting that they were all in their thirties. She then recruited the 24-year-old Mio Shirai to the stable; Shirai, however, announced that she would also remain a member of White Tails. The two groups then agreed that the stable which would manage to draw fewer people to their self-produced Wave event, which would take place August 7 and 8, would disband. The Black Dahlia event was headlined by an eight-woman tag team match between the stable's two generations. In the match, Ohata teamed with Apple Miyuki, Hanako Nakamori and Mio Shirai against Ohka, Ayako Hamada, Bambi and Cherry, pinning Ohka for the win after hitting her with the stable's signature whip. White Tails ended up winning the battle for attendance 201-191, forcing Black Dahlia to disband.
Ohata and Yumi Ohka faced off on August 26 at Wave's fifth anniversary event in a singles match, which was won by Ohata. Following the win, Ohata announced that she had signed with the Zabun production company, effectively making Pro Wrestling Wave her new home promotion and officially ending her freelancing days. On September 25, Ohata entered the 2012 Dual Shock Wave tournament with her handpicked partner Tsukasa Fujimoto, with the two wrestling Ayako Hamada and Kana to a draw in their opening round-robin match. After wins over Apple Miyuki and Kyusei Ninja Ranmaru and Wave Tag Team Champions Gami and Tomoka Nakagawa, Ohata and Fujimoto finished their round-robin block with five points, winning their block and advancing to the finals of the tournament. 
Misaki Ohata