Pry bar (also commonly called a crowbar, wrecking bar, or prybar in different regions).
It’s a YATO brand model, 300 mm (about 12 inches) long, made from CrMo (Chrome-Molybdenum steel), which is a strong, durable alloy often used for tools that need to withstand prying, levering, or light demolition force without bending or breaking easily.