Itchy scalp, dry scalp, flaky scalp, dandruffs, oily scalp and hair or bad smells, there are many factors one could be suffering from when it comes to scalp. Some of these troubles need to be medically treated but some others can be remedied by a proper daily care. In Japan, partly because of humid weather, we particularly care about our scalp and try to maintain it clean and healthy as part of etiquette.
Based on a pure observation: I noticed that there is less bald people, especially among young people, in Japan than in the western countries. Although this is the result of many elements: hormones, heredity, food etc. But what if the shampoo routine played a role in this too?