Why does Japan consistently adopt this higher-cost packaging method?

Is it just for beauty?

Next, the editor will explain the reason for everyone↓

First, Japan does not allow the use of non-environmentally friendly plastic drums, unless they are biodegradable plastic drums; however, the cost of biodegradable plastic packaging is higher than that of iron drums.

Second, iron cans are easy to recycle. Everyone knows that Japan is a country with relatively few resources.

Third, safety is more guaranteed, because lubricating oil is a dangerous chemical, and if it leaks, it will damage the environment.