Nagoya City One Year Perfect Attendance Award Badge/名古屋市壹年皆勤賞章

See also https://asiamedals.info/threads/nagoya-city-overtime-work-award-badge.28272/

Obverse

勤 - Industrious; Diligent

reverse

賞 - Award

壹年皆勤 - One Year Perfect Attendance

名古屋市 - Nagoya City

 

Another example.