was a Japanese daimyo

Daimyo

is a generic term referring to the powerful territorial lords in pre-modern Japan who ruled most of the country from their vast, hereditary land holdings...

 of the Edo period

Edo period

The , or , is a division of Japanese history which was ruled by the shoguns of the Tokugawa family, running from 1603 to 1868. The political entity of this period was the Tokugawa shogunate....

 who served the Tokugawa clan

Tokugawa clan

The was a powerful daimyo family of Japan. They nominally descended from Emperor Seiwa and were a branch of the Minamoto clan by the Nitta clan. However, the early history of this clan remains a mystery.-History:...

. He was also known as Ii Naotsugu. Naokatsu succeeded to family headship following his father's death in 1602. Under Tokugawa Ieyasu's orders, Naokatsu completed construction of Hikone Castle in 1606, and then moved there from Sawayama Castle

Sawayama Castle

is a castle in the city of Hikone, Shiga Prefecture, Japan. This castle was an important military stronghold of Ōmi Province. The Azai clan held this castle in the Sengoku Period. Ishida Mitsunari held it at the end of the 16th century after the ruin of the Azai clan.This castle was attacked by...

 when it was largely completed. In 1614, as Naokatsu was ill, he sent his brother Naotaka to fight in the Siege of Osaka

Siege of Osaka

The was a series of battles undertaken by the Tokugawa shogunate against the Toyotomi clan, and ending in that clan's destruction. Divided into two stages , and lasting from 1614 to 1615, the siege put an end to the last major armed opposition to the shogunate's establishment...

; Naokatsu himself was assigned to Annaka, where he undertook security duty in the Kantō region. After the siege of Osaka, Tokugawa Ieyasu rewarded Naokatsu's younger brother Naotaka

Ii Naotaka

was a Japanese daimyo of the early Edo period who served under the Tokugawa shogunate. He was the son of the famous Tokugawa general Ii Naomasa.Naotaka served in the Siege of Osaka in his brother Naokatsu's stead, where he would gain tremendous favor for his exploits at Tennoji. After the battle,...

 with the Ii family headship, and allowed Naokatsu to form a branch family with holdings at the fief of Annaka

Annaka Domain

The ' was a Japanese domain of the Edo period, located in Kōzuke Province.The Meiji-era educator Joseph Hardy Neesima was the son of a retainer of the Itakura clan of Annaka.-List of lords:*Ii clan #Naokatsu#Naoyoshi...

 in Kōzuke Province

Kozuke Province

was an old province located in the Tōsandō of Japan, which today comprises Gunma Prefecture. It is nicknamed as or .The ancient provincial capital was near modern Maebashi. During the Sengoku period, Kōzuke was controlled variously by Takeda Shingen, Uesugi Kenshin, the late Hōjō clan, and...

, worth some 30,000-koku. Naokatsu retired in 1632, yielding headship to his son Naoyoshi. He died in Ōmi Province

Omi Province

is an old province of Japan, which today comprises Shiga Prefecture. It was one of the provinces that made up the Tōsandō circuit. It is nicknamed as .Lake Biwa, Japan's largest lake, is located at the center of the province...

 in 1662.

His descendants were moved around several times before having their holdings settle at Itoigawa, in Echigo Province

Echigo Province

was an old province in north-central Japan, on the shores of the Sea of Japan. It was sometimes called , with Echizen and Etchū Provinces. Today the area is part of Niigata Prefecture, which also includes the island which was the old Sado Province. This province was the northernmost part of the...

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