Also known as: Acala, Acalanatha Vidya-raja, The Immovable

Fudou Myouou is the chief of the Five Great Kings of Wisdom, whose direction is the center. He is the destroyer of delusion and protector of Buddhism; he is called The Immovable because he is unmoved by carnal temptations. He seeks to transform anger into salvation, and is usually depicted as a fiercely-scowling figure with a demon-subduing sword in one hand and a rope in the other. He is worshiped as a manifestation of Dainichi Nyorai.

Shiohara Nagi's great-aunt (younger sister of her mother's father), a woman who seems very concerned with her family's image and whom Nagi dislikes.

Fukashi Junior High (a fictional school) is where Takaya and Yuzuru attended junior high. Takaya had a reputation as a trouble student there. He and Yuzuru were in the same class in their first year and in different classes in their second year. Takaya started skipping school about midway through his first year, after his parents divorced.

Kayama was in Yuzuru's class in second year, and Yokomori and Ichinose were a year above them.

Fukui City is the capital of Fukui Prefecture, located in the north-central part of Honshuu on the coast of the Sea of Japan. The city was heavily bombed and devastated during World War II.

A prefecture located in the Touhoku region of Japan's main island of Honshuu. It was formerly a part of the province of Mutsu.

Fukuzawa Yukichi was a Japanese author, writer, teacher, translator, entrepreneur and political theorist who is regarded as one of the founders of modern Japan and a leader of the Meiji Restoration.

He learned Dutch, then English after Commodore Perry arrived in Japan and traveled to the US and Europe as envoy for the Tokugawa Shogunate. His writings about these travels, Seiyou Jijou (Things Western), became best-sellers, and he was regarded as Japan's foremost expert on the West. His works were preeminent during the Meiji Period, and in them he emphasized the importance of understanding the principle of equality of opportunity, study as the key to greatness, and individual strength. These works greatly aided the pro-modernization forces of Japan during the period of unrest in the last days of the Tokugawa Shogunate and motived the Japanese people to embrace change.

Fukuzawa's portrait appears on the 10,000-yen note and was the only figure to remain after the banknotes redesign in the early 2000s.

Futarasan Shrine is a Shinto shrine located in the city of Nikkou founded by Holy Priest Shoudou. It enshrines three mountain deities: Ookuninushi, Tagorihime, and Ajisukitakahikone of Mt. Nantai (also called Mt. Futara), Mt. Nyohou, and Mt. Tarou.

Its main shrine (Honden) was built in 767, its middle shrine (Chuuguushi ) in 784, and its rear shrine (Okumiya) in 782.

Historically: The name Fuuma Kotarou was given to each leader of the Fuuma Clan/organization of ninjas which served the Later Houjou Clan, starting with its first leader. The clan started information-gathering and espionage activities in the time of Houjou Souun, the founder of the Later Houjou Clan. The clan name began as 風間, composed of the characters for "wind" and "space", but was changed to its present form, a homophone composed of the characters for "wind" and "evil/demonic/magical."

In its 100 years of service to the Houjou Clan, the most renowned Fuuma Kotarou was the fifth, who served Houjou Ujimasa and his son Houjou Ujinao (unknown - 1603). Stories say that he was 7'1". One of his most famous exploits was in 1580 and the Battle of Kise-gawa, during which he slipped into the enemy camp at night and caused mass chaos. Another famous ninja, Ninokuruwa Isuke, also belonged to the Fuuma Clan.

After the destruction of the Houjou Clan, Kotarou and the Fuuma Clan became thieves near Edo. Kotarou was captured and executed in 1603 from information given by Kousaka Jinai, another ninja-turned-thief who formerly served the Takeda Clan.

In Mirage of Blaze: Fuuma Kotarou leads the Fuuma ninjas in service to the Houjou Clan. He is described as a tall, slender man with broad shoulders and a muscular but supple body. He wears his hair long, tied in a long tail that reaches to his waist.