With the development of new rice lands, by the Kyōhō era (1716-1735), the kokudaka of Toyama Province was assessed at 140,000 koku.

[3] He was the second son of Maeda Toshitsune, the third daimyō of the Kaga Domain and was granted the courtesy title of chamberlain and Junior 4th Court Rank in his genpuku ceremony in 1631.

In 1639, Maeda Toshitsune separated a 100,000 koku holding from Kaga Domain and elevated him to the status of daimyō.

He attempted to start new industries, including the selling of Traditional Chinese medicines, for which Toyama later became famous.

Toshioki was born in Toyama as the second son of Maeda Masatoshi, and inherited the domain and its problems on his father's death in 1706.

Financial problems forced him to lay off 60 retainers, to become more severe in tax collection and to pass sumptuary laws.

However, the Tokugawa shogunate made matters worse by assigning the reconstruction of the temple of Zōjō-ji in Edo to Toyama Domain in 1713.

Maeda Toshitaka (前田 利隆) (December 11, 1690 – January 22, 1745) was the fourth daimyō of Toyama Domain.

In order to rectify the domain's finances, he encouraged the formation of the kabunakama system, with price controls and 15-year extensions on the repayment of loans, all to no avail.

Maeda Toshitomo (前田 利與) (November 11, 1737 – September 15, 1794) was the sixth daimyō of Toyama Domain.

In 1771, the shogunate again called on Toyama Domain, this time to dispatch troops to Hida Province to suppress a revolt.

These demands from the shogunate caused the domain to default on its loans, and it was forced to lay off hundreds of its samurai.

Maeda Toshihisa (前田 利謙) (April 10, 1762 – September 18, 1787) was the seventh daimyō of Toyama Domain.

Maeda Toshinori (前田 利謙) (December 22, 1768 – October 3, 1801) was the eighth daimyō of Toyama Domain.

Maeda Toshitsuyo (前田 利幹) (January 2, 1772 – August 31, 1836) was the ninth daimyō of Toyama Domain.

The same year, he annoused a five-year plan for restructuring the clan's finances, and invited a merchant from Osaka, Ishida Kozaemon to Toyama as his financial advisor.

Maeda Toshiyasu (前田 利保, March 23, 1800 – September 14, 1859) was the tenth daimyō of Toyama Domain.

On taking office, the domain was hit hard by a crop failure, which continued through 1838 as part of the Tenpō famine.

Maeda Toshitomo (前田 利友, March 10, 1834 – January 18, 1854) was the eleventh daimyō of Toyama Domain.

He was only 12 years old at the time and was in poor health, so all governance was left in the hands of his parents and senior retainers.

This led to a conflict between the retainers based in Edo and those remaining in Toyama, which erupted in an O-Ie Sōdō on his death in 1854 at the age of 20.

Maeda Toshikata (前田 利聲, March 15, 1835 – February 16, 1904) was the twelfth daimyō of Toyama Domain.

The situation peaked in 1857 when Maeda Nariyasu of Kaga Domain was forced to step in to resolve the conflict, which he did by largely firing the members of the Edo faction.

Count Maeda Toshiatsu (前田 利同, July 28, 1856 – December 23, 1921) was the thirteenth (and final) daimyō of Toyama Domain.

The title passed to his adopted son, Count Maeda Toshio (前田 利男, November 4, 1886 – December 29, 1966).