A ninja or shinobi was a covert agent or mercenary in feudal Japan. The functions of a ninja included reconnaissance, espionage, infiltration, deception, ambush, bodyguarding and their fighting skills in martial arts, including ninjutsu. Their covert methods of waging irregular warfare were deemed dishonorable and beneath the honor of the samurai. Though shinobi proper, as specially trained spies and mercenaries, appeared in the 15th century during the Sengoku period, antecedents may have existed as early as the 12th century.
Ibaraki Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Ibaraki Prefecture has a population of 2,871,199 and has a geographic area of 6,097.19 square kilometres. Ibaraki Prefecture borders Fukushima Prefecture to the north, Tochigi Prefecture to the northwest, Saitama Prefecture to the southwest, Chiba Prefecture to the south, and the Pacific Ocean to the east.
Koga is a city located in Ibaraki Prefecture, Japan. As of 1 October 2020, the city had an estimated population of 138,446 in 56,097 households and a population density of 1120 persons per km². The percentage of the population aged over 65 was 28.98%. The total area of the city is 123.58 square kilometres (47.71 sq mi).
The Kuma River is a river in Kumamoto Prefecture, central Western part of Kyūshū, Japan. It is sometimes referred as Kumagawa River. It is the longest river in Kyushu, with the length of 115 km long and has a drainage area of 1,880 km2 (730 sq mi). The tidal flat of the Kuma River estuary is approximately 1000 hectares.
Mineichi Koga was a Japanese Marshal Admiral and commander-in-chief of the Imperial Japanese Navy's Combined Fleet.
Prefectural roads in Japan are roads usually planned, numbered and maintained by the government of the respective prefecture, independent of other prefectures – as opposed to national roads (kokudō), which in legal terms include national expressways, and municipal roads ([ku]shichōsondō). Where a national or prefectural road runs through the territory of a designated major city, the city government assumes part of the responsibility for these roads. By length, 10.7 % of public roads in Japan were prefectural roads as of 2011; by usage, they carried more than 30% of all traffic volume on public roads as of 2007.
Toshihiko Koga was a Japanese judoka, 9th degree black belt and Olympic champion who competed in the -71 kg and -78 kg divisions. Koga is regarded as having perhaps the greatest ippon seoi nage ever. He died of cancer on March 24, 2021 at the age of 53.
Koga Domain was a feudal domain under the Tokugawa shogunate of Edo period Japan. It is located in Shimōsa Province, Honshū. The domain was centered at Koga Castle, located in what is the city of Koga in Ibaraki Prefecture.
Tetsu Nakamura, also known as Kaka Murad, , was a Japanese physician and honorary Afghan citizen who headed Peace Japan Medical Services (PMS), an aid group known as Peshawar-kai in Japanese.
The Akutan Zero, also known as Koga's Zero(古賀のゼロ) and the Aleutian Zero, was a type 0 model 21 Mitsubishi A6M Zero Japanese fighter aircraft that crash-landed on Akutan Island, Alaska Territory, during World War II. It was found intact by the Americans in July 1942 and became the first flyable Zero acquired by the United States during the war. It was repaired and flown by American test pilots. As a result of information gained from these tests, American tacticians were able to devise ways to defeat the Zero, which was the Imperial Japanese Navy's primary fighter plane throughout the war.
Koga Station is a passenger railway station in the city of Koga, Ibaraki, Japan, operated by East Japan Railway Company.
The rōmon is one of two types of two-storied gate used in Japan. Even though it was originally developed by Buddhist architecture, it is now used at both Buddhist temples and Shinto shrines. Its otherwise normal upper story is inaccessible and therefore offers no usable space. It is in this respect similar to the tahōtō and the multi-storied pagoda, neither of which offers, in spite of appearances, usable space beyond the first story. In the past, the name also used to be sometimes applied to double-roof gates.
Aura: Koga Maryuin's Last War is a Japanese light novel written by Romeo Tanaka, with illustrations by Mebae, published by Shogakukan under their Gagaga Bunko imprint in July 2008. A manga adaptation by Kōichirō Hoshino was serialized in Shogakukan's Shōnen Sunday S between February 2012 and March 2013. An anime film by AIC ASTA premiered in April 2013.
The Japan men's national volleyball team represents Japan in international volleyball competitions and friendly matches. Their nickname is "RYUJIN NIPPON ", meaning "Japanese Dragon God" or "Dragon God of Japan" in Japanese. Japan won a bronze medal at the Tokyo 1964 Olympic Games, followed by silver at Mexico 1968 and a gold at Munich 1972. The years after this have been less successful. Japan missed three successive Olympic Games before returning at Beijing 2008, where they failed to win a match. Japan then failed to qualify for the London 2012 Olympic Games and also missed Rio 2016 after finishing seventh at the World Olympic Qualification Tournament in Tokyo.
Taiyo Koga is a Japanese football player. He plays for Kashiwa Reysol.
Ashikaga Ujihime, or Ashikaga no Ujihime, Ashikaga Ujinohime was the de facto Koga kubō in Sengoku period. She was the daughter of 5th Koga kubō Ashikaga Yoshiuji and Jōkō-in. She was a woman trained in martial arts and received education from the highest court. In 1583 when Yoshiuji died without a male heir, Ujihime succeeded her father at the young age of nine, she took the title Koga kubō and inherited an area equivalent the Koga domain.
Takuma Koga is a Japanese professional stock car racing driver who competes full-time in the ARCA Menards Series West, driving the No. 7 Toyota Camry for Jerry Pitts Racing as well as part-time in the NASCAR Xfinity Series, driving the No. 13 Toyota Supra for MBM Motorsports.
Yūsei Koga is a Japanese professional shogi player ranked 4-dan.
Takahiro Koga is a Japanese footballer currently playing as a goalkeeper for Albirex Niigata (S).
