I saw the units of traditional Japanese army. I think it would be better to remove the word 'Ashigaru'.
By the latter part of the Edo era, the military character of the Ashigaru became very weak and became the role of a bureaucrat or police officer.
And it is difficult to name simply Ashigaru. Because at that time, the class was also subdivided in Ashigaru.
When the Daimyos have to rearm their army with Western weapons, the Ashigaru, who had been the main force of the past, had already become a subordinate bureaucrat or an honorary officer and had to recruit a commoner class called '小者' to train new soldier. Ashigaru, of course, served as a sergeants of a new army composed of commoners. However, all of the soldiers could not be called Ashigaru.
In the 1862 military reforms of the Shogunate, the infantry conscripted the commoners, called "兵賦", for every manor in Hatamoto. The cavalry was conscripted in '與力' and artillery was conscripted in '同心'. (Both 與力 and 同心 are the names of the subdivided Ashigaru class.) Even in the Shogunate, Ashigaru became difficult to refer to as a military organization.
And I think Katana Levy is also inappropriate. Katana is not something that levies can easily possess. I think it would be better to call it 'Ronin'. Many anti-Shogunate samurais have acted as 'Ronin' to prevent harm to their daimyo reputation.