IWGP Women's Championship

Kaori Housako is a Japanese professional wrestler and actress working for New Japan Pro-Wrestling (NJPW) and World Wonder Ring Stardom under the ring name Kairi. Housako is also known for her work with WWE as Kairi Sane . She is a former IWGP Women's Champion.

New Japan Pro-Wrestling Co., Ltd. (NJPW) is a Japanese professional wrestling promotion based in Nakano, Tokyo. Founded on January 13, 1972, by Antonio Inoki, the promotion was sold to Yuke's, who later sold it to Bushiroad in 2012. TV Asahi and Amuse, Inc. own minority shares of the company. Naoki Sugabayashi has served as the promotion's Chairman since September 2013, while Takami Ohbari has served as the president of the promotion since October 2020.

Bushiroad Inc. is a Japanese entertainment company, producer of collectible card games and trading cards, publisher of mobile apps and games, promotional items and many other venues, which was founded in 2007 by Takaaki Kidani and is headquartered in Tokyo. Bushiroad created and owns various media franchises such as Tantei Opera Milky Holmes. Since 2019, Bushiroad is listed on the Tokyo Stock Exchange and has traded on the TSE since its launch on July 24, 2019.

Historic X-Over was a professional wrestling event co-promoted by New Japan Pro-Wrestling (NJPW) and World Wonder Ring Stardom (Stardom). It took place on November 20, 2022, at the Ariake Arena in Tokyo, Japan.

Giulia is an English-born Italian-Japanese professional wrestler, currently signed to World Wonder Ring Stardom, where she is the current World of Stardom Champion in her first reign. She is also a former Wonder of Stardom Champion, Goddess of Stardom Champion and Artist of Stardom Champion. She is also the current and founding leader of the Donna Del Mondo stable.

Donna del Mondo is a professional wrestling stable, currently performing in the Japanese professional wrestling promotion, World Wonder Ring Stardom. Founded by Giulia, the stable also consists of Maika, Himeka, Thekla and Mai Sakurai. The stable is often known by Giulia's catchphrase arrivederci, which is a reference to her Italian background.

Mayu Iwatani is a Japanese professional wrestler currently signed to World Wonder Ring Stardom, where she is the leader of Stars. Since making her debut in January 2011, she became a two-time World of Stardom Champion, two-time Wonder of Stardom Champion, one-time High Speed Champion, one-time SWA World Champion, two-time Goddess of Stardom Champion, and a five-time Artist of Stardom Champion, while also having won the Cinderella Tournament back to back in 2015 and 2016, and the 2018 5*Grand Prix. She also made appearances for Stardom's American partner Ring of Honor (ROH), where she is a former one-time Women of Honor World Champion. Dave Meltzer of the Wrestling Observer Newsletter has called Iwatani and fellow Japanese workers Io Shirai and Kairi Hojo "three of the best wrestlers in the world".

Oedo Tai is a villanous professional wrestling stable, currently performing in the Japanese professional wrestling promotion World Wonder Ring Stardom, and formerly in the Japanese independent scene. The stable currently consists of Natsuko Tora, Saki Kashima, Ruaka, Rina, Fukigen Death, Starlight Kid, Karma and Momo Watanabe.

Queen's Quest is a professional wrestling stable, currently performing in the Japanese professional wrestling promotion, World Wonder Ring Stardom. The stable is led by Utami Hayashishita and also consists of AZM, Saya Kamitani, Lady C, Hina and Miyu Amasaki.

Royal Quest II was a professional wrestling event promoted by New Japan Pro-Wrestling (NJPW). The event took place on October 1 & 2, 2022 at the Crystal Palace Indoor Arena in London, England.

The Goddesses of Stardom Tag League is a professional wrestling round-robin tag team tournament held annually by the Japanese professional wrestling promotion World Wonder Ring Stardom. It was created in 2011.

Momo Watanabe is a Japanese professional wrestler currently signed to the World Wonder Ring Stardom promotion. Since making her debut on November 16, 2014, she became a two-time Artist of Stardom Champion, one-time Goddess of Stardom Champion and one-time Wonder of Stardom Champion.

Kaori Housako is a Japanese professional wrestler and actress working for New Japan Pro-Wrestling (NJPW) and World Wonder Ring Stardom under the ring name Kairi. Housako is also known for her work with WWE as Kairi Sane . She is a former IWGP Women's Champion.

Battle in the Valley was a professional wrestling pay-per-view (PPV) event produced by New Japan Pro-Wrestling (NJPW). It took place on February 18, 2023, at San Jose Civic in San Jose, California.

San Jose, officially the City of San José, is a major city in the U.S. state of California, the cultural, financial, and political center of Silicon Valley, and largest city in Northern California by both population and area. With a 2020 population of 1,013,240, it is the most populous city in both the Bay Area and the San Jose–San Francisco–Oakland Combined Statistical Area, which has a 2015 population of 7.7 million and 9.7 million people respectively, the third most populous city in California, and the tenth-most populous in the United States. Located in the center of the Santa Clara Valley on the southern shore of San Francisco Bay, San Jose covers an area of 179.97 sq mi (466.1 km2). San Jose is the county seat of Santa Clara County and the main component of the San Jose–Sunnyvale–Santa Clara Metropolitan Statistical Area, with an estimated population of around two million residents in 2018.

Historic X-Over was a professional wrestling event co-promoted by New Japan Pro-Wrestling (NJPW) and World Wonder Ring Stardom (Stardom). It took place on November 20, 2022, at the Ariake Arena in Tokyo, Japan.

Tokyo, officially the Tokyo Metropolis, is the capital and most populous city of Japan. Formerly known as Edo, its metropolitan area is the most populous in the world, with an estimated 37.468 million residents as of 2018; the city proper has a population of 13.99 million people. Located at the head of Tokyo Bay, the prefecture forms part of the Kantō region on the central coast of Honshu, Japan's largest island. Tokyo serves as Japan's economic center and is the seat of both the Japanese government and the Emperor of Japan.

Japan is an island country in East Asia. It is situated in the northwest Pacific Ocean and is bordered on the west by the Sea of Japan, extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans an archipelago of 14,125 islands covering 377,975 square kilometers (145,937 sq mi); the five main islands are Hokkaido, Honshu, Shikoku, Kyushu, and Okinawa. Tokyo is the nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto.

Mayu Iwatani is a Japanese professional wrestler currently signed to World Wonder Ring Stardom, where she is the leader of Stars. Since making her debut in January 2011, she became a two-time World of Stardom Champion, two-time Wonder of Stardom Champion, one-time High Speed Champion, one-time SWA World Champion, two-time Goddess of Stardom Champion, and a five-time Artist of Stardom Champion, while also having won the Cinderella Tournament back to back in 2015 and 2016, and the 2018 5*Grand Prix. She also made appearances for Stardom's American partner Ring of Honor (ROH), where she is a former one-time Women of Honor World Champion. Dave Meltzer of the Wrestling Observer Newsletter has called Iwatani and fellow Japanese workers Io Shirai and Kairi Hojo "three of the best wrestlers in the world".

A single-elimination, knockout, or sudden death tournament is a type of elimination tournament where the loser of each match-up is immediately eliminated from the tournament. Each winner will play another in the next round, until the final match-up, whose winner becomes the tournament champion. Each match-up may be a single match or several, for example two-legged ties in European sports or best-of series in American pro sports. Defeated competitors may play no further part after losing, or may participate in "consolation" or "classification" matches against other losers to determine the lower final rankings; for example, a third place playoff between losing semi-finalists. In a shootout poker tournament, there are more than two players competing at each table, and sometimes more than one progressing to the next round. Some competitions are held with a pure single-elimination tournament system. Others have many phases, with the last being a single-elimination final stage, often called playoffs.