NCO Attendant's Badge
Damaged badge, which allows the construction to be seen.
This is called the NCO Attendant’s Badge in most English sources. The Japanese title for
labor in this sense may also be translated as ‘merit’ since this badge was awarded to NCOs
who had served 6 or more years without a major blemish on their records.

It was established in either Meiji 37 [1904] or Meiji 41 [1908], according to two different
Japanese sources I found. Peterson’s English language book shows the badge but doesn’t
give any dates.
You can see that they are slightly different in color, both the center
blossom and the branches. Since there was only one version of this
badge, this difference was the result of having different manufacturers.
The reverses of these two have different shaped pins as well:
Most badges you will see have the wider pin (left) without an inscription.
This inscription identifies the maker : Made by Wada Hiko, Osaka.
An officer wearing the NCO badge.
A line by line translation:
1. Infantry 19th Regiment
2. Army Sergeant-Major Morino Ryouichi
3. For years of meritorious service, the Labor Badge is awarded. (The thick red line shows
the name of the badge.)
4. Showa 8 [1933] May 8
5. Infantry 19th Regiment Commander, Army Infantry Corporal Udaka [?], Holder of the Junior
5th Rank and the 3rd Class Medal [either the Rising Sun or Sacred treasure].