noun
minimum hourly wage
Refers to the legal minimum wage per hour. Often used in discussions of labor policy and part-time work.
最低時給が上がっても、生活はまだ苦しい。
Even though the minimum hourly wage has risen, life is still hard.
この地域の最低時給は全国平均より低い。
The minimum hourly wage in this region is lower than the national average.
最低賃金 is the broader term for 'minimum wage' (can be hourly, daily, or monthly), while 最低時給 specifically means 'minimum hourly wage'.
Compound of 最低 (minimum) + 時給 (hourly wage).