It can be said that the merit of registering a trademark is low in a business that seeks to attract customers based on the credit of workmanship, personality, achievements, etc., rather than the credit accompanies signboard of the shop.
For example, in Japanese beauty salons, it is common for customers to appoint a beautician to provide services such as cutting, and often the salary paid by the shop to the beautician is also determined by the number of nominations.
Therefore, beauty salons are attracting customers with trust in the beautician rather than trust in the beauty salon, and the trademark of the beauty salon is not so important.
In addition, privately run restaurants, doctors, lawyers, consultants, etc. are industries where there is little need to register trademarks.
Of course, even in the above industries, if the scale of business expands (for example, opening a second store) and when the brand gains credibility independently of personal credibility, it will be necessary to register the trademark.