The Genius of the SkyIYO SKY EST. 2007 · 5′1″ · 119 LB · 2× WORLD · ⟨ THE GENIUS OF THE SKY ⟩
Io Shirai · The Ace of Stardom · Damage CTRL · RHIYO

The Genius of the SkyIyo Sky

Japan · Stardom · NXT · WWE · 2007–present

NOWRaw, no championship · came up short against Liv Morgan at SummerSlam on a hurt knee, and has since taken Sol Ruca's side against The Judgment Day
2×WWE World Titles
246Day WWE Women's Reign
5.0First WWE women's 5-star
2026Queen of the Ring
PHOTO SLOT Est. 2007 · Japan
Roster File · The Genius of the SkyMasami Odate
01

Overview

Iyo Sky is the rare wrestler whose Japanese career and American career would each, on their own, justify a page like this. In Stardom she was the promotion's Ace: a two-time World of Stardom Champion whose second reign ran eighteen months with a record fourteen defences, the first wrestler to complete Stardom's Grand Slam, and Tokyo Sports' Joshi Wrestler of the Year three years running, 2015 through 2017. In WWE she has held world titles on both current lineages — the WWE Women's Championship for 246 days from a SummerSlam 2023 cash-in, and the Women's World Championship for 132 days in 2025 — and her WrestleMania 41 triple threat with Rhea Ripley and Bianca Belair became the first women's match in WWE history rated five stars by Dave Meltzer. She is the 2026 Queen of the Ring.

She was born Masami Odate on May 8, 1990, debuted on March 4, 2007 at sixteen while still in high school, trained by Tomohiko Hashimoto, and wrestled Mexico from 2010 under names including Viva Kasai before Stardom made her Io Shirai. WWE signed her out of the 2018 Mae Young Classic, where she lost the final to Toni Storm at Evolution; as Io Shirai she held the NXT Women's Championship for 304 days from June 7, 2020. The renaming to Iyo Sky came with the July 2022 main-roster call-up and the founding of Damage CTRL with Bayley and Dakota Kai at SummerSlam 2022 — the faction that carried her through two tag title reigns, the 2023 briefcase, and the championship run that made the American half of the career undeniable.

The 2026 shape: RHIYO — the tag team with Rhea Ripley — won the Women's Tag Team Championship on the January 5 Raw and lost it to The Irresistible Forces after 53 days, dissolving when Ripley moved to SmackDown after WrestleMania 42, where Sky helped Ripley win the WWE Women's Championship from Jade Cargill. She won the Queen of the Ring final over Liv Morgan at Night of Champions on June 27 and chose Morgan's Women's World Championship for SummerSlam. The challenge failed on August 1 — she hurt her own knee driving Morgan into the ring post, absorbed interference from Roxanne Perez and Raquel Rodriguez, and was pinned at 13:35 — and she has answered it by siding with Sol Ruca against The Judgment Day, winning a tag match with Ruca over Perez and Rodriguez on the August 10 Raw. That is where she stands as of August 31, 2026: on Raw, unbelted, and still the division's measuring stick.

02

The Record

WWE world titles
World of Stardom
304Day NXT reign
246Day WWE Women's reign
WWE Women's Tag
2026Queen of the Ring

Sixteen documented bouts - a highlight subset, not a career count, and deliberately light on the Stardom years: only bouts with verified day-precision dates and opponents are listed, which excludes most of the runs that made her the Ace. No career win-loss total is published because none was verified. Filter by match type, tap any column header to sort, and turn spoilers on to reveal results.

The book is kayfabe protected

ResDatePromoEventOpponent(s)StipulationTitle
L2016-07-24STARDOMStardom, Korakuen HallToni StormSingles - ends her run as inaugural champion after three defencesSWA World Championship
L2018-10-28WWEEvolutionToni StormMae Young Classic 2018 final, as Io Shirai
W2020-06-07WWENXT TakeOver: In Your HouseCharlotte Flair & Rhea RipleyTriple threat - wins the title from FlairNXT Women's Championship
L2021-04-07WWENXT TakeOver: Stand & DeliverRaquel GonzalezSingles - the 304-day reign endsNXT Women's Championship
W2022-09-12WWERawRaquel Rodriguez & AliyahWith Dakota Kai - Damage CTRL's first goldWWE Women's Tag Team Championship
W2023-07-01WWEMoney in the Bank - LondonThe 2023 women's ladder match fieldWins the briefcase
W2023-08-05WWESummerSlam - DetroitBianca BelairMoney in the Bank cash-in - first main-roster world titleWWE Women's Championship
L2024-04-07WWEWrestleMania XL Night 2BayleySingles - the 246-day reign endsWWE Women's Championship
W2025-03-03WWERawRhea RipleySingles - second main-roster world titleWomen's World Championship
W2025-04-20WWEWrestleMania 41 Night 2Rhea Ripley & Bianca BelairTriple threat - the first women's match in WWE rated five stars by Dave MeltzerWomen's World Championship
L2025-07-13WWEEvolutionNaomiMoney in the Bank cash-in - the 132-day reign endsWomen's World Championship
W2026-01-05WWERaw - New YorkThe Kabuki WarriorsWith Rhea Ripley, as RHIYOWWE Women's Tag Team Championship
L2026-02-27WWESmackDown - LouisvilleThe Irresistible ForcesWith Rhea Ripley - the 53-day reign endsWWE Women's Tag Team Championship
W2026-06-27WWENight of Champions - RiyadhLiv MorganQueen of the Ring final - Spanish Fly and Over the Moonsault
L2026-08-01WWESummerSlam Night 1 - MinneapolisLiv MorganSingles - challenge; hurt her knee mid-match, pinned at 13:35Women's World Championship
W2026-08-10WWERawRaquel Rodriguez & Roxanne PerezWith Sol Ruca, against The Judgment Day

11 of 16 matches shown

Curated ledger · documented highlights · some bouts are not listed

03

Signature Matches

The one verified rating, and two bouts chosen for weight rather than stars - no unverified ratings are printed.

5.0★★★★★

WrestleMania 41 Night 2

vs Rhea Ripley & Bianca Belair

Women's World Championship triple threat — the first five-star women's match in WWE

SummerSlam 2026 Night 1

vs Liv Morgan

Women's World Championship — fought through her own knee injury; Forbes called it an instant classic

Evolution 2018

vs Toni Storm

Mae Young Classic final — the match that closed her signing

04

Championships

WWE world reigns
World of Stardom
7thWWE Women's Grand Slam
2Countries with a Grand Slam

A championship record split across two continents - the first wrestler to complete a Grand Slam in both Japan and the United States. Stardom reign counts are Wikipedia's; individual Stardom reign dates beyond those shown were not re-verified in this pass.

W

WWE Women's Championship

August 5, 2023 – April 7, 2024 · won by Money in the Bank cash-in on Bianca Belair at SummerSlam, lost to Bayley at WrestleMania XL · 246 days, with defences against Zelina Vega, Asuka, Charlotte Flair and Belair

1REIGNS
V

Women's World Championship

March 3 – July 13, 2025 · won from Rhea Ripley on Raw, retained in the five-star WrestleMania 41 triple threat, lost at Evolution when Naomi cashed in Money in the Bank · 132 days

1REIGNS
N

NXT Women's Championship

June 7, 2020 – April 7, 2021, as Io Shirai · 304 days · won from Charlotte Flair in a triple threat also involving Rhea Ripley, lost to Raquel Gonzalez

1REIGNS
T

WWE Women's Tag Team Championship

Twice with Dakota Kai in 2022–23 (48 and 114 days) · once with Rhea Ripley as RHIYO, January 5 – February 27, 2026, 53 days

3REIGNS
X

NXT Women's Tag Team Championship

With Zoey Stark, July 6 – October 26, 2021 · 111 days

1REIGNS
S

World of Stardom Championship

2013–14 (468 days, 10 defences) and December 23, 2015 – June 21, 2017 — an eighteen-month reign with a record 14 defences

2REIGNS
D

Wonder of Stardom Championship

Including a 2017–18 reign with a record 12 defences · part of the first Stardom Grand Slam ever completed

2REIGNS
A

Artist of Stardom Championship

Stardom’s trios title · individual reign dates not verified in this pass

6REIGNS
G

SWA World Championship and others

Inaugural SWA World Champion (lost to Toni Storm, July 24, 2016, after three defences) · Goddesses of Stardom and High Speed Championships, one reign each

3REIGNS
05

Factions

The Stardom unit she led, the WWE faction that defined her call-up, and the tag team that did not survive a brand split.

Stardom · 2016–2018

Queen's Quest

Io Shirai, leading

The Stardom stable she fronted through the back half of her Ace run - the banner under which the record-setting second World of Stardom reign happened.

WWE · 2022–2025

Damage CTRL

Bayley, Iyo Sky, Dakota Kai; later Asuka and Kairi Sane

Formed at SummerSlam on July 30, 2022 - the vehicle for her entire first main-roster act. It produced two tag title reigns with Kai, covered the 2023 briefcase win and the 246-day WWE Women's Championship reign, turned face in July 2024, and dissolved in May 2025 after Dakota Kai's release.

WWE · 2025–2026

RHIYO

Iyo Sky, Rhea Ripley

Formed October 11, 2025 out of a rivalry that kept resolving into respect. Women's Tag Team Champions from January 5 to February 27, 2026 - 53 days - and finished when Ripley moved to SmackDown after WrestleMania 42, where Sky helped her win the WWE Women's Championship from Jade Cargill.

WWE · 2026–present

With Sol Ruca, against The Judgment Day

Iyo Sky, Sol Ruca

Not a named unit - an alliance formed after SummerSlam 2026, answering the Judgment Day interference that shaped her title loss. She and Ruca beat Raquel Rodriguez and Roxanne Perez on the August 10 Raw, and she was in Ruca's corner again on August 24.

06

Personas

Half a dozen masks and names on the way up, and two that mattered: Io Shirai (Stardom and NXT) → Iyo Sky (WWE, 2022–present).

MXMexico · 2010–2015

Viva Kasai and others

The lucha apprenticeship, worked under several names including Viva Kasai and Oyuki, with a hair-vs-mask apuestas win in November 2011. It is where the high-wire style was finished.

IOStardom & NXT · 2011–2022

Io Shirai

The Ace of Stardom and, from 2018, NXT's self-styled Evil Genius. Two World of Stardom reigns, three straight Tokyo Sports awards, a 304-day NXT Women's Championship reign, and a heel turn in June 2019 that gave the character its edge.

ISWWE · 2022–present

Iyo Sky

The renaming came with the July 2022 call-up and Damage CTRL. The Genius of the Sky is the same wrestler with the villainy made optional - since the 2024 face turn she has been booked as the division's purest in-ring standard, the one five-star matches and Queen of the Ring crowns get measured against.

07

Career Timeline

Sixteen-year-old trainee to the first Grand Slam on two continents.

2007

Debut at sixteen

Debuts March 4, 2007 while still in high school, trained by Tomohiko Hashimoto. Her sister Mio Shirai also wrestled.

2013

First World of Stardom Championship

Wins Stardom's top title on April 29, 2013 and holds it 468 days with ten defences.

2015

The Ace years begin

Starts the second World of Stardom reign on December 23, 2015 - eighteen months and a record fourteen defences - and opens a run of three straight Tokyo Sports Joshi Wrestler of the Year awards.

2018

Mae Young Classic and WWE

Signs with WWE, reaches the Mae Young Classic final and loses it to Toni Storm at Evolution on October 28. Debuts for NXT that November as Io Shirai.

2020

NXT Women's Champion

Wins the title from Charlotte Flair in a triple threat with Rhea Ripley at TakeOver: In Your House on June 7 and holds it 304 days.

2022

Iyo Sky and Damage CTRL

Renamed on the main-roster call-up; founds Damage CTRL with Bayley and Dakota Kai at SummerSlam on July 30, and wins tag gold with Kai that September.

2023

Briefcase, then champion

Wins Money in the Bank in London on July 1 and cashes in on Bianca Belair at SummerSlam on August 5 for the WWE Women's Championship.

2024

The 246 days end

Loses the title to Bayley at WrestleMania XL on April 7 after 246 days.

2025

A second world title and the five-star first

Beats Rhea Ripley for the Women's World Championship on the March 3 Raw, retains in the WrestleMania 41 triple threat Meltzer rated five stars - a first for women's wrestling in WWE - and loses the title at Evolution on July 13 to Naomi's cash-in. Forms RHIYO with Ripley on October 11.

2026

Tag gold, the Queen's crown, and a knee

Wins the tag titles with Ripley on January 5 and loses them February 27; helps Ripley win the WWE Women's Championship at WrestleMania 42; wins Queen of the Ring over Liv Morgan on June 27 in Riyadh; loses the SummerSlam title match to Morgan on August 1 after hurting her knee; sides with Sol Ruca against The Judgment Day in August.

08

Rivalries

Who she went to war with.

Rhea Ripley

The defining relationship of her 2024-26: title matches in March 2025, a double-DQ, the five-star WrestleMania 41 triple threat, and then a tag team - RHIYO - built out of mutual respect that won gold in January 2026. She repaid the account at WrestleMania 42 by helping Ripley beat Jade Cargill for the WWE Women's Championship.

Liv Morgan

The 2026 rivalry: Sky pinned the champion clean in the Queen of the Ring final on June 27 in Riyadh, then lost the SummerSlam title match on August 1 with a hurt knee and The Judgment Day working the margins - Morgan had also cracked her in the head with the belt on the July Raw that set the match up. The clean tournament pin is the fact Sky's next challenge will be built on.

Bayley

Faction leader, then the loss that mattered most: Bayley turned on Damage CTRL and took the WWE Women's Championship from her at WrestleMania XL on April 7, 2024, ending the 246-day reign - the only time Sky has dropped a world title by pinfall in a straight singles match.

Toni Storm

The recurring early rival on two continents: Storm ended her inaugural SWA World Championship reign in July 2016 and beat her in the Mae Young Classic final at Evolution in October 2018 - the match WWE signed her off the back of.

Naomi

The cash-in. Naomi took the Women's World Championship at Evolution on July 13, 2025 with the same briefcase mechanism Sky had used on Bianca Belair two years earlier - a loss with no rematch, because the title picture moved on without either of them.

09

Media & Gaming

Thin by design - the verified list is short, and nothing is added to pad it.

2022–

WWE 2K

A playable fixture of the current WWE 2K series. Her exact debut entry - and whether early appearances were billed as Io Shirai - was not verified in this pass, so no year is claimed.

Game
2018

Mae Young Classic

Her WWE introduction was itself a television product: the 2018 tournament run ended in the final at Evolution, WWE's first all-women pay-per-view.

TV
2015–2017

Tokyo Sports awards

Three consecutive Joshi Wrestler of the Year awards - the Japanese sports-press record of the Ace years. No memoir, documentary or scripted role could be verified, so none is listed.

Press
10

Records & Feats

The records, stated the way the sources state them - with the shared milestones marked as shared.

5.0First WWE women's five-star
246Day WWE Women's reign
14Defences, second Stardom reign

First five-star women's match in WWE history

The WrestleMania 41 Night 2 triple threat with Rhea Ripley and Bianca Belair, April 20, 2025, per Dave Meltzer's rating as reported by Wikipedia. She won it as champion. The milestone belongs to all three women; the victory is hers.

First wrestler with a Grand Slam in both Japan and the United States

Stardom's first-ever Grand Slam, completed across its four championships, plus WWE's - Wikipedia lists her as the seventh WWE Women's Grand Slam and tenth Women's Triple Crown champion.

World champion on both WWE lineages

WWE Women's Championship, 246 days (August 5, 2023 - April 7, 2024); Women's World Championship, 132 days (March 3 - July 13, 2025). One won by cash-in, one lost to a cash-in.

Record 14 defences of the World of Stardom Championship

Second reign, December 23, 2015 to June 21, 2017 - roughly eighteen months as the Ace of Stardom, after a first reign of 468 days.

2026 Queen of the Ring

Won June 27, 2026 at Night of Champions in Riyadh by pinning Women's World Champion Liv Morgan - a champion pinned clean in a non-title final, which is why the SummerSlam challenge followed automatically.

Royal Rumble 2025 iron woman - for a few hours

Entered No. 1 and lasted 1:06:45, breaking the women's longevity record - which was itself surpassed later the same night, per Wikipedia. Stated here with the caveat most retellings drop.

Tokyo Sports Joshi Wrestler of the Year, three straight

2015, 2016 and 2017 - the run no other wrestler of her generation matched.

No career win-loss total is published - none was verified. Her billed height and weight (5'1", 119 lb) are long-standing billing figures; WWE.com's profile was not harvested for vitals in this pass. Sources give her birthplace only as Japan, so nothing more precise appears here.

11

Official & Reference

Follow, connect and verify.

12

Frequently Asked

Why did Io Shirai become Iyo Sky?

WWE renamed her on the main-roster call-up in July 2022, when she debuted at SummerSlam as a founding member of Damage CTRL. “Io Shirai” was the Stardom ring name she had carried since 2011 and kept through four years of NXT — the new spelling kept the sound of her name while giving WWE a mark it owned. She was born Masami Odate; neither name is her legal one.

Was Iyo Sky in the first five-star women's match in WWE history?

Yes — and she won it, as champion. The WrestleMania 41 Night 2 triple threat on April 20, 2025, against Rhea Ripley and Bianca Belair for the Women's World Championship, was the first women's match in WWE rated five stars by Dave Meltzer, per Wikipedia. The milestone is shared by all three women; the result is not.

Is Iyo Sky a champion right now, and what happened at SummerSlam?

No. As of August 31, 2026 she holds no title. She earned a Women's World Championship match by pinning champion Liv Morgan in the Queen of the Ring final on June 27, but lost the SummerSlam Night 1 match on August 1 at 13:35 — she hurt her own knee driving Morgan into the ring post with a meteora, took interference from Roxanne Perez and Raquel Rodriguez, and was pinned after a Codebreaker and Ob-Liv-ion. Since then she has allied with Sol Ruca against The Judgment Day on Raw.

What did Iyo Sky accomplish in Japan?

She was the Ace of Stardom: two World of Stardom Championship reigns — 468 days with ten defences, then eighteen months from December 2015 with a record fourteen — two Wonder of Stardom reigns including one with a record twelve defences, six Artist of Stardom trios titles, the inaugural SWA World Championship, the 2014 5STAR Grand Prix, the first Stardom Grand Slam ever completed, and Tokyo Sports’ Joshi Wrestler of the Year in 2015, 2016 and 2017.