An ancient province of Japan with was split from Echigo, comprising of parts of the modern prefectures of Yamagata and Akita. It was held by the Mogami and Akita clans.

An ancient province in north-central Japan which was ruled by Uesugi Kenshin during the Sengoku Period. Now a part of Niigata Prefecture.

A province of ancient Japan which is Kumamoto Prefecture on the island of Kyuushuu today. It bordered the provinces of Chikugo, Bungo, Hyuuga, Osumi, and Satsuma, and was held by the lords of those provinces during the Sengoku Period until Toyotomi Hideyoshi invaded Higo. He gave the province to Sassa Narimasa, then Katou Kiyomasa, then the Hosokawa Clan.

A small mountain-ringed province located on the main island of Honshuu, famous for its ninja clans and considered one of the birthplaces of the ninja arts. Its distance from major trade routes, relative inaccessibility, and defensibility made it unattractive to invasion from outside forces. By the mid-1600s the local warrior clans had banded together to keep the province independent, forming a league known as the "League of all Commons of Iga" (伊賀惣国一揆 Iga Soukoku Ikki).

However, Oda Nobunaga invaded the province with an overwhelming force of 40,000 - 60,000 troops in 1581, two years after a failed invasion by his son Oda Nobukatsu, ruthlessly slaughtering many of its inhabitants, thus putting an end to the independence of the Iga League.

Izu was a ancient province of Japan that consisted of the Izu Peninsula, today a part of Shizuoka Prefecture, and the Izu Archipelago, today a part of Tokyo. During the Sengoku Period, Houjou Souun took Izu as his first province.

A province of ancient Japan that is today a part of southern Ishikawa Prefecture which once bordered on the provinces of Echizen, Ecchuu, Hida, and Noto. The priest Rennyo of Hongan Temple arrived in the 15th century to preach the tenets of True Pure Land Buddhism, which spread rapidly among the samurai and peasants of the region. They banded together into the Ikkou Sect to create a "Peasant's Kingdom", which lasted for a hundred years until Sakuma Morimasa overthrew it by order of Oda Nobunaga in 1580.

Three years later, Maeda Toshiie invaded the province and took it for Toyotomi Hideyoshi. The Maeda Clan ruled it thereafter, focusing on culture and art instead of military and warfare, and developed the province into the richest domain outside of Tokugawa Shogunate. Kaga was famous for its gold-leaf, inlaid work, and calligraphy, promoted by its Maeda lords.

Kazusa was a province of ancient Japan which is now the south-central part of Chiba Prefecture. It was held by several clans, including the Kazusa-Takeda, Sakai, Toki, and Awamasaki (under Satomi) Clans. Later the Takeda, Sakai, and Toki Clans submitted to the Houjou Clan, which continued fighting fierce battles with the Satomi Clan.

And ancient province of Japan located on Honshuu which forms the eastern half of Aichi Prefecture today. Mikawa bordered on the provinces of Owari, Mino, Shinano, and Totomi.

Mikawa was the original domain of Tokugawa Ieyasu before he gained control of the Kantou.

An ancient province of Japan on the island of Honshuu which is the southern part of Gifu Prefecture today. Mino bordered on the provinces of Echizen, Hida, Ise, Mikawa, Omi, Owari, and Shinano.

Also known as: Oushuu (奥州)

The largest province of ancient Japan, situated in northern Honshuu, which was ruled by various clans during the Sengoku, including the Uesugi, Nambu, and Date. It was divided into the prefectures of Fukushima, Miyagi, Iwate, and Aomori.

Name for the combined provinces of Mutsu and Dewa.

An ancient province in south-central Japan which was ruled by the Later Houjou Clan during the Sengoku Period. Now a part of Kanagawa Prefecture.

Also known as: Tsu-no-kuni (津国), Sesshuu-no-kuni (摂州)

A province of ancient Japan which is the eastern part of Hyougo Prefecture and the northern part of Osaka Prefecture today. During the Sengoku Era, the Miyoshi Clan ruled the province as well as its bordering provinces Izumi and Kawachi, until they were conquered by Oda Nobunaga.

An ancient province of Japan which is now the Prefecture of Nagano. Its abbreviated name is Shinshuu. Shinano was one of Takeda Shingen's centers of power during his battles with Uesugi Kenshin and bordered on the provinces of Echigo, Etchu, Hida, Kai, Kozuke, Mikawa, Mino, Musashi, Suruga, and Totomi. Its capital was located near the present-day city of Matsumoto.

The eastern part of present-day Shizuoka Prefecture, ruled by the Imagawa clan for much of the Sengoku Period. It was later taken over by Takeda Shingen when Imagawa Yoshimoto was defeated by Oda Nobunaga. When Tokugawa Ieyasu came to power the province was assigned to one of his allies.