Princess Kako watches Japan national tennis championship final

Princess Kako watches Japan national tennis championship final

Japanese Princess Kako poses for a photo with Ryotaro Taguchi, winner of the Japan national men's singles tennis championship, at Ariake Coliseum in Tokyo on Oct. 12, 2025.

Princess Kako watches Japan national tennis championship final

Princess Kako watches Japan national tennis championship final

Japanese Princess Kako poses for a photo with Ryotaro Taguchi, winner of the Japan national men's singles tennis championship, at Ariake Coliseum in Tokyo on Oct. 12, 2025.

Princess Kako watches Japan national tennis championship final

Princess Kako watches Japan national tennis championship final

Japanese Princess Kako visits Ariake Coliseum in Tokyo on Oct. 12, 2025, to watch the final of the Japan national men's singles tennis championship.

Princess Kako watches Japan national tennis championship final

Princess Kako watches Japan national tennis championship final

Japanese Princess Kako hands the Emperor's Cup to Ryotaro Taguchi, winner of the Japan national men's singles tennis championship, at Ariake Coliseum in Tokyo on Oct. 12, 2025.

Tennis: Japan Open

Tennis: Japan Open

Carlos Alcaraz of Spain poses with the victor's trophy after winning the men's singles title at the Japan Open tennis tournament at Ariake Coliseum in Tokyo on Sept. 30, 2025.

Tennis: Japan Open

Tennis: Japan Open

Carlos Alcaraz of Spain celebrates after beating Taylor Fritz of the United States in the men's singles final at the Japan Open tennis tournament at Ariake Coliseum in Tokyo on Sept. 30, 2025.

Tennis: Japan Open

Tennis: Japan Open

Carlos Alcaraz of Spain holds the victor's trophy after winning the men's singles title at the Japan Open tennis tournament at Ariake Coliseum in Tokyo on Sept. 30, 2025.

Tennis: Japan Open

Tennis: Japan Open

Carlos Alcaraz of Spain celebrates after beating Taylor Fritz of the United States in the men's singles final at the Japan Open tennis tournament at Ariake Coliseum in Tokyo on Sept. 30, 2025.

Tennis: Japan Open

Tennis: Japan Open

Carlos Alcaraz of Spain celebrates after beating Taylor Fritz of the United States in the men's singles final at the Japan Open tennis tournament at Ariake Coliseum in Tokyo on Sept. 30, 2025.

Tennis: Japan Open

Tennis: Japan Open

Carlos Alcaraz of Spain plays against Taylor Fritz of the United States in the men's singles final at the Japan Open tennis tournament at Ariake Coliseum in Tokyo on Sept. 30, 2025.

Tennis: Japan Open

Tennis: Japan Open

Carlos Alcaraz of Spain plays against Taylor Fritz of the United States in the men's singles final at the Japan Open tennis tournament at Ariake Coliseum in Tokyo on Sept. 30, 2025.

Tennis: Davis Cup

Tennis: Davis Cup

Yosuke Watanuki (R) and Takeru Yuzuki of Japan play against Kevin Krawietz and Tim Puetz of Germany in the second round of the Davis Cup team tennis qualifiers at Ariake Coliseum in Tokyo on Set. 13, 2025.

Tennis: Davis Cup

Tennis: Davis Cup

Yosuke Watanuki (R) and Takeru Yuzuki of Japan talks during their double match against Kevin Krawietz and Tim Puetz of Germany in the second round of the Davis Cup team tennis qualifiers at Ariake Coliseum in Tokyo on Set. 13, 2025.

Tennis: Davis Cup

Tennis: Davis Cup

Yosuke Watanuki (R) and Takeru Yuzuki of Japan play against Kevin Krawietz and Tim Puetz of Germany in the second round of the Davis Cup team tennis qualifiers at Ariake Coliseum in Tokyo on Set. 13, 2025.

Tennis: Davis Cup

Tennis: Davis Cup

Yannick Hanfmann (R) of Germany and Shintaro Mochizuki of Japan greet one another at the net after their singles match in the second round of the Davis Cup team tennis qualifiers at Ariake Coliseum in Tokyo on Set. 12, 2025.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka speaks at Tokyo's Ariake Coliseum on April 13, 2024, after Japan clinched a berth for the Billie Jean King Cup tennis team competition finals in Spain in November.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka warms up ahead of a qualifying tie for the Billie Jean King Cup tennis team competition at Tokyo's Ariake Coliseum on April 13, 2024.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka (far L) and teammates pose for a photo at Tokyo's Ariake Coliseum on April 13, 2024, after they clinched a berth for the Billie Jean King Cup tennis team competition finals in Spain in November.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka (far L) and teammates pose for a photo at Tokyo's Ariake Coliseum on April 13, 2024, after they clinched a berth for the Billie Jean King Cup tennis team competition finals in Spain in November.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka acknowledges the crowd after beating Kazakhstan's Yulia Putintseva in a Billie Jean King Cup qualifying tie at Tokyo's Ariake Coliseum on April 12, 2024.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka reacts after beating Kazakhstan's Yulia Putintseva in a Billie Jean King Cup qualifying tie at Tokyo's Ariake Coliseum on April 12, 2024.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka plays against Kazakhstan's Yulia Putintseva during a Billie Jean King Cup qualifying tie at Tokyo's Ariake Coliseum on April 12, 2024.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka plays against Kazakhstan's Yulia Putintseva during a Billie Jean King Cup qualifying tie at Tokyo's Ariake Coliseum on April 12, 2024.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka plays against Kazakhstan's Yulia Putintseva during a Billie Jean King Cup qualifying tie at Tokyo's Ariake Coliseum on April 12, 2024.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka plays against Kazakhstan's Yulia Putintseva during a Billie Jean King Cup qualifying tie at Tokyo's Ariake Coliseum on April 12, 2024.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka plays against Kazakhstan's Yulia Putintseva during a Billie Jean King Cup qualifying tie at Tokyo's Ariake Coliseum on April 12, 2024.

Tennis: Billie Jean King Cup

Tennis: Billie Jean King Cup

Japan's Naomi Osaka plays against Kazakhstan's Yulia Putintseva during a Billie Jean King Cup qualifying tie at Tokyo's Ariake Coliseum on April 12, 2024.

Tennis: Toray Pan Pacific Open

Tennis: Toray Pan Pacific Open

Russian Veronika Kudermetova poses with her champion trophy after winning the women's singles final at the Toray Pan Pacific Open tennis tournament on Oct. 1, 2023, at Ariake Coliseum in Tokyo.

Davis Cup tennis

Davis Cup tennis

TOKYO, Japan - Kei Nishikori plays against Canada's Peter Polansky during the first singles match of their Davis Cup World Group first-round fixture at Ariake Coliseum in Tokyo on Jan. 31, 2014. Nishikori won 6-4, 6-4, 6-4.

Davis Cup tennis

Davis Cup tennis

TOKYO, Japan - Kei Nishikori plays against Canada's Peter Polansky during the first singles match of their Davis Cup World Group first-round fixture at Ariake Coliseum in Tokyo on Jan. 31, 2014. Nishikori won 6-4, 6-4, 6-4.

Davis Cup tennis

Davis Cup tennis

TOKYO, Japan - Kei Nishikori reacts after beating Canada's Peter Polansky 6-4, 6-4, 6-4 in the first singles match of their Davis Cup World Group first-round fixture at Ariake Coliseum in Tokyo on Jan. 31, 2014.

Japanese, U.S. tennis stars play charity match

Japanese, U.S. tennis stars play charity match

TOKYO, Japan - Current and past Japanese and U.S. tennis stars play a doubles game at Ariake Coliseum in Tokyo on Nov. 22, 2014, as part of a charity event to support reconstruction work in the northeastern Japan region of Tohoku ravaged by the 2011 earthquake and tsunami disaster. (From L) Michael Chang, Andrei Agassi, Kei Nishikori and Shuzo Matsuoka.

Japan tennis star Nishikori walks in animal costume

Japan tennis star Nishikori walks in animal costume

TOKYO, Japan - Japanese tennis star Kei Nishikori walks in an animal costume before a friendly match with former U.S. top player Andre Agassi at Ariake Coliseum in Tokyo on Nov. 22, 2014, in a charity event to support reconstruction work in the northeastern Japan region of Tohoku ravaged by the 2011 earthquake and tsunami disaster.

Japan tennis star Nishikori smiles during charity match

Japan tennis star Nishikori smiles during charity match

TOKYO, Japan - Japanese tennis star Kei Nishikori smiles during a friendly doubles match at Ariake Coliseum in Tokyo on Nov. 22, 2014, as his partner, American legend Andre Agassi, looks on in a charity event to support reconstruction work in the northeastern Japan region of Tohoku ravaged by the 2011 earthquake and tsunami disaster.

Japan tennis star Nishikori smiles on umpire chair

Japan tennis star Nishikori smiles on umpire chair

TOKYO, Japan - Japanese tennis star Kei Nishikori smiles on an empire's chair during a friendly match at Ariake Coliseum in Tokyo on Nov. 22, 2014, in a charity event to support reconstruction work in the northeastern Japan region of Tohoku ravaged by the 2011 earthquake and tsunami disaster.

Access for handicapped checked at Paralympic stadium

Access for handicapped checked at Paralympic stadium

TOKYO, Japan - A group of handicapped people checks the accessibility of facilities at the Ariake Coliseum, the venue for the tennis competition at the 2020 Tokyo Olympic and Paralympic Games, in Tokyo on July 16, 2014.

Computer program beats professional shogi player

Computer program beats professional shogi player

TOKYO, Japan - Tatsuya Sugai, a professional shogi or Japanese chess player who holds the 5 "dan" ranking, plays a game against a computer program dubbed "Shuso" at the 3rd Denno shogi championship at Ariake Coliseum in Tokyo on March 15, 2014. Shuso won the first round of five planned matches between the program and professional players.

Computer program beats professional shogi player

Computer program beats professional shogi player

TOKYO, Japan - Tatsuya Sugai, a professional player of shogi, or Japanese chess, plays against the computer program "Shuso" at Ariake Coliseum in Tokyo on March 15, 2014, with an industrial robot arm moving shogi pieces based on instructions from the program. Sugai was beaten in the first of five matches in this year's human versus computer series.

Computer program beats professional shogi player

Computer program beats professional shogi player

TOKYO, Japan - Tatsuya Sugai, a professional player of shogi, or Japanese chess, plays against the computer program "Shuso" at Ariake Coliseum in Tokyo on March 15, 2014, with an industrial robot arm moving shogi pieces based on instructions from the program. Sugai was beaten in the first of five matches in this year's human versus computer series.

Computer program beats professional shogi player

Computer program beats professional shogi player

TOKYO, Japan - Tatsuya Sugai, a professional player of shogi, or Japanese chess, plays against the computer program "Shuso" at Ariake Coliseum in Tokyo on March 15, 2014, with an industrial robot arm moving shogi pieces based on instructions from the program. Sugai was beaten in the first of five matches in this year's human versus computer series.

Japan earns promotion to Fed Cup World Group

Japan earns promotion to Fed Cup World Group

TOKYO, Japan - Kimiko Date-Krumm (far R) and other members of Japan's Fed Cup team acknowledge the crowd after winning a must-win playoff series against Belgium at Tokyo's Ariake Coliseum on April 22, 2012, to earn a long-awaited return to the top-tier World Group next season.

Phoenix win bj-league title

Phoenix win bj-league title

TOKYO, Japan - Hamamatsu Higashimikawa Phoenix forward Jeffrey Parmer (R) advances to the basket during the bj-league final against the Ryukyu Golden Kings at Ariake Coliseum in Tokyo on May 22, 2011. The Phoenix beat the Golden Kings 82-68. Parmer was named MVP.

WBA champ Valero pummels Lozada for 1st round TKO

WBA champ Valero pummels Lozada for 1st round TKO

TOKYO, Japan - WBA super featherweight champion Edwin Valero of Venezuela (L) faces Mexican Michael Lozada in the first round of their fight at Tokyo's Ariake Coliseum on Jan. 3. Valero stopped Lozada in the first round, successfully defending his first title.

Kenneth Carlsen wins men's singles in Japan Open

Kenneth Carlsen wins men's singles in Japan Open

TOKYO, Japan - Kenneth Carlsen of Denmark kisses the winner's trophy at Ariake Coliseum in Tokyo on Oct. 6 after beating Magnus Norman of Sweden to win the men's singles in the Japan Open tennis tournament.

Jill Craybas wins women's singles in Japan Open

Jill Craybas wins women's singles in Japan Open

TOKYO, Japan - Jill Craybas of the United States reacts after beating Silvija Talaja of Croatia to win the women's singles of the Japan Open tennis tournament at Ariake Coliseum in Tokyo on Oct. 6.

Hewitt whips Chang to cruise into Japan Open q'finals

Hewitt whips Chang to cruise into Japan Open q'finals

TOKYO, Japan - World No. 1 Lleyton Hewitt (L) shakes hands with former French Open champion Michael Chang at Ariake Coliseum in Tokyo on Oct. 2 after defeating Chang 6-2, 6-2 to ease into the quarterfinals of the Japan Open.

Sugiyama advances to quarterfinals of Toyota Princess Cup

Sugiyama advances to quarterfinals of Toyota Princess Cup

TOKYO, Japan - Ai Sugiyama celebrates after beating Joanette Kruger of South Africa at Tokyo's Ariake Coliseum on Sept. 20 to advance to the quarterfinals of the Toyota Princess Cup tennis tournament.

Date defeats No. 1 Graf

Date defeats No. 1 Graf

Japan's Kimiko Date defeats Steffi Graf of Germany in first-round of the World Group of Fed Cup singles match between Japan and Germany at Tokyo's Ariake Coliseum on April 28.

Princess Kako watches tennis tournament in Tokyo

Princess Kako watches tennis tournament in Tokyo

Japanese Princess Kako watches the men's singles final at the Rakuten Japan Open tennis championships at Tokyo's Ariake Coliseum on Oct. 9, 2022.

Princess Kako watches tennis tournament in Tokyo

Princess Kako watches tennis tournament in Tokyo

Japanese Princess Kako visits Tokyo's Ariake Coliseum to watch the men's singles final at the Rakuten Japan Open tennis championships on Oct. 9, 2022.